OBD-II Code C0382: Transfer Case Position Sensor Circuit Malfunction

What Does C0382 Mean?

Code C0382 means the Transfer Case Control Module (TCCM) detects a fault in the transfer case position sensor circuit. This sensor reports whether the vehicle is in 2WD, 4WD High, or 4WD Low. When this signal is lost, out of range, or intermittent, the TCCM triggers the 'Service 4WD' light and disables the 4WD system to prevent mechanical damage.

Technical definition: C0382 is a generic chassis code indicating a Transfer Case Position Sensor circuit malfunction. The TCCM detects the sensor's signal is out of its expected electrical range, missing entirely, or intermittent, preventing the module from confirming the engaged gear.

Can I Drive With C0382?

⚠️Yes, But With Caution. Yes, but your four-wheel drive (4WD) system is disabled. The vehicle is safe to drive in two-wheel drive, but you lack 4WD capability for poor weather or off-road terrain. If the transfer case is stuck partially engaged, driving causes severe drivetrain binding. If you hear grinding or feel binding on turns, stop driving immediately and tow the vehicle to prevent catastrophic damage.

Common Causes

• Corroded TCCM Ground Wire (Very Common) — On GM trucks, the G110 ground wire on the frame under the driver's door corrodes heavily from road salt. This poor ground connection is the leading cause of 4WD system errors and is the first item to check.
• Faulty Transfer Case Encoder Motor/Position Sensor (Very Common) — The position sensor is integrated into the transfer case shift motor. The internal sensor contacts wear out, or the motor shorts internally, sending incorrect position data to the TCCM.
🎬 See this step-by-step transfer case encoder motor replacement guide.
• Defective 4WD Selector Switch (Common) — The dashboard switch used to select 4WD modes fails due to bad solder joints or worn contacts. It sends erratic resistance values to the TCCM, mimicking a sensor or motor failure.
🎬 Watch: How to test and replace the 4WD selector switch.
• Damaged Wiring Harness (Common) — Wiring between the TCCM and encoder motor frays from road debris, chafes against the frame, or melts against the exhaust, breaking the sensor circuit.
• Internal TCCM Failure (Less Common) — The Transfer Case Control Module fails due to internal circuit board degradation, failed solder joints, or water damage, preventing it from processing sensor signals.
• Low Battery Voltage (Uncommon) — A weak battery causes severe voltage drops during engine cranking. The TCCM is highly sensitive to voltage and sets false C0382 codes if it lacks sufficient power during startup.
• Water Intrusion into Connectors (Uncommon) — Failed grommets allow water into the transfer case actuator harness connector, causing pin corrosion. This is a documented issue on 2019+ GM trucks.
• Poorly Seated Connectors (Rare) — Connectors at the TCCM or encoder motor back out due to vibration or improper installation during a previous repair, causing intermittent signal loss.

Symptoms

• Service 4WD light is on — A 'Service 4WD' or 'Check 4x4' warning message illuminates on the driver information center.
• Unable to shift 4WD modes — The vehicle refuses to switch between 2WD, 4WD High, or 4WD Low, remaining stuck in its current mode.
• 4WD selector switch lights blink continuously — The dashboard switch lights flash without going solid. This indicates the TCCM commanded a shift but the position sensor failed to confirm the shift completed.
• Grinding or binding when turning — The system defaults to a partially engaged state, causing severe drivetrain binding and grinding during low-speed turns on dry pavement.
• Dead 4WD switch — Pressing the 4WD buttons yields zero response—no clicks, no flashing lights. This points to a failed switch, blown fuse, or dead TCCM.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this code.

Common Fixes & Costs

• Clean or Repair TCCM Ground Wire — Parts: $0-$10, Labor: $0-$150, ~0.8 hr book time (DIY)
• Replace 4WD Selector Switch — Parts: $40-$150, Labor: $50-$100, ~0.6 hr book time (DIY)
  Chevy/GMC/Cadillac (2003-2007): OEM
• Replace Transfer Case Encoder Motor — Parts: $150-$400, Labor: $150-$300, ~1.8 hr book time (Intermediate)
  Chevy/GMC (2003-2007, NP8): OEM
• Repair Wiring Harness/Connector — Parts: $10-$100, Labor: $150-$400, ~2.5 hr book time (Advanced)
  GM Trucks (2019+): OEM
• Replace Transfer Case Control Module (TCCM) — Parts: $200-$600, Labor: $100-$250, ~1.5 hr book time (Intermediate)
  Chevy/GMC (2003-2007): OEM

DIY vs Professional

• Clean or Repair TCCM Ground Wire 🟢 Beginner
  Tools: Socket set, wire brush, dielectric grease.
• Replace 4WD Selector Switch 🟢 Beginner
  Tools: Plastic trim removal tools, small socket.
• Replace Transfer Case Encoder Motor 🟢 Beginner
  Tools: Jack and stands, socket set, torque wrench. May require front driveshaft removal.
• Repair Wiring Harness/Connector 🟢 Beginner
  Tools: Multimeter, wire strippers, crimpers, heat shrink, soldering iron.
• Replace Transfer Case Control Module (TCCM) 🟢 Beginner
  Tools: Socket set, trim removal tools.

Used vs. New Parts: Buying Guide

When a used part is worth it: A used OEM encoder motor from a low-mileage donor vehicle is a reliable alternative to cheap aftermarket parts, which suffer from premature failure. It makes sense for older vehicles where new OEM parts exceed the vehicle's value.

Donor-vehicle mileage cap: roughly under 80000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the donor vehicle wasn't scrapped for a drivetrain failure.
• Avoid parts from heavy road salt regions; inspect external housings and pins for corrosion.
• Match the RPO code (e.g., NP8) and part number exactly. Internal gearing differs between models.

Decision logic:

• If Part is the 4WD selector switch → Buy new aftermarket; the cost is low ($40-$60) and the risk is minimal.
• If Part is the encoder motor on a vehicle with >120k miles → Buy a remanufactured OEM unit with a warranty or a low-mileage used OEM part.
• If Part is the Transfer Case Control Module (TCCM) → Buy a new or remanufactured unit pre-programmed to your VIN. Used TCCMs require dealer reprogramming.

Warranty tradeoff: Used parts offer 30-90 day warranties. New aftermarket parts offer 1-year warranties. Quality remanufactured OEM parts offer 1-3 year warranties.

Worst-case if a used part fails: $300-$600 if a cheap aftermarket encoder motor fails, requiring a second replacement and another 2 hours of labor.

What Happens If You Wait — Timeline

1. 0-1 month: Code C0382 sets and the 'Service 4WD' light appears. The 4WD system is disabled. The vehicle operates normally in 2WD. (MPG impact: 0%% · Added cost: $0)
2. 1-6 months: Loss of 4WD capability becomes a safety hazard in snow or mud. The underlying corrosion or wiring damage worsens. (MPG impact: 0%% · Added cost: $0)
3. Ongoing (if mechanical bind exists): If the transfer case is stuck partially between gears, driving creates severe drivetrain binding, destroying U-joints and driveshafts. (MPG impact: 5%% · Added cost: $300-$1500)
4. 6+ months (with binding condition): Catastrophic transfer case failure. Internal chains snap or gears shatter, locking up the drivetrain and damaging the transmission. (MPG impact: 0%% · Added cost: $2000-$5000)

Cost of Not Fixing It

• Immediate: Loss of all 4WD and AWD capability. The vehicle remains in 2WD, making it unsafe in conditions requiring extra traction. (Added cost: $0)
• 1-6 months: If the failure causes a mechanical bind (stuck between gears), continued driving destroys the driveshafts, U-joints, and transfer case internals. (Added cost: $200-$800)
• 6+ months: Ignoring a binding condition leads to catastrophic transfer case failure, potentially locking up the drivetrain while driving and destroying the transmission. (Added cost: $2000-$5000)

Diagnosis Steps

1. Check the 4WD/TCCM Fuses
   Locate the fuse box and pull the fuses labeled 'ATC', 'TCCM', or '4WD'. A blown fuse indicates a direct short circuit that must be repaired before replacing the fuse.
   Tools: Fuse puller or needle-nose pliers (Beginner)
2. Inspect and Clean the Main TCCM Ground
   On GM trucks, locate the G110 ground wire on the frame rail below the driver's door. Remove the bolt, wire brush the terminal and frame to bare metal, apply dielectric grease, and tighten securely.
   Tools: Socket set, wire brush, dielectric grease (Beginner)
3. Test 4WD Selector Switch Resistance
   Remove the dashboard 4WD switch. Using a multimeter, measure resistance across the pins while pressing each button. Compare values to the service manual (e.g., GM 2HI = ~2.0 kΩ). Infinite resistance means the switch is dead.
   Tools: Trim removal tools, multimeter, service manual (Intermediate)
4. Read Codes with a Chassis-Capable Scanner
   Use an advanced OBD-II scanner to read Chassis (C) codes. Record C0382 and any accompanying codes (like C0327). Clear the codes and attempt a shift to see which return immediately.
   Tools: Advanced OBD-II Scan Tool (Beginner)
5. Inspect Wiring Harness and Connectors
   Visually trace the harness from the TCCM to the encoder motor. Look for melted insulation near the exhaust or chafing on the frame. Disconnect plugs and check for green corrosion or water intrusion.
   Tools: Flashlight, mechanic's mirror (Intermediate)
6. Perform a Live Data 'Wiggle Test'
   Connect a scan tool and view the live 'Transfer Case Position Sensor Voltage'. Systematically wiggle the wiring harness under the vehicle. A sudden voltage drop indicates a broken wire inside the insulation.
   Tools: Advanced Scan Tool (live data capable) (Intermediate)
7. Test Position Sensor Circuit Voltages
   Back-probe the sensor connector at the transfer case with the key on. Verify a steady 5V reference from the TCCM, a solid ground (<0.1V), and a signal wire that changes voltage smoothly when a shift is commanded.
   Tools: Multimeter, back-probe pins, wiring diagram (Advanced)
8. Test the Transfer Case Shift Motor
   Command a shift using a bi-directional scan tool. Listen for motor movement. If the TCCM sends 12V to the motor control wires but the motor doesn't move, the motor is internally seized or stripped.
   Tools: Bi-directional Scan Tool, multimeter (Advanced)
9. Monitor Live Data PIDs for Position Sensor
   Watch the 'Encoder Signal' PID on a scan tool. Command a shift to 4HI. The value should change smoothly and stabilize. Erratic or 'Invalid' readings confirm a failed sensor or circuit.
   Tools: Advanced Bi-Directional Scan Tool (Advanced)
10. Verify TCCM Power and Ground
    If the TCCM is unresponsive, back-probe the main TCCM connector. Verify it receives full battery voltage (12V+) on its power pins and has less than 0.1V drop on its ground pins under load.
    Tools: Multimeter, wiring diagram, back-probe pins (Advanced)

When This Code Triggers (Freeze-Frame Conditions)

• Vehicle Speed: 0-10 mph (During or immediately after a commanded 4WD shift attempt)
• Battery Voltage: 10.5-12.0V (During engine crank, if a weak battery causes a voltage drop)
• Engine State: Key On, Engine Off (During the TCCM's initial self-test and relearn process at startup)
• Vehicle Speed: 20-60 mph (During steady driving, if an intermittent wiring fault briefly breaks the circuit)

Related Codes

• C0327 — Encoder Circuit Malfunction. Frequently sets with C0382. C0327 confirms the sensor's return signal is out of range, isolating the fault to the encoder motor sensor or its direct wiring.
• C0306 — Motor A/B Control Circuit Malfunction. Indicates a failure in the electric motor itself. If you hear no click when shifting, C0306 is likely. If you hear a click but C0382 sets, the motor moved but the sensor failed to read it.
• C0374 — General System Performance. A secondary code that sets alongside C0382 when the TCCM detects a problem but cannot pinpoint the exact circuit.
• C0398 — Rotational Position Sensor Mismatch. Sets when the TCCM sees a disagreement between the reported sensor position and the commanded shift position.

Climate & Environmental Factors

• Road Salt / Corrosive Environments: Salt spray coats the undercarriage, rapidly corroding the TCCM ground connection (GM G110), wiring harness pins, and the encoder motor housing. This is the leading cause of C0382.
• High Humidity / Water Exposure: Failed connector grommets allow moisture into the harness, causing pin corrosion. Driving through deep water forces moisture into seals not designed for submersion.
• Extreme Cold: Cold temperatures make old plastic wiring insulation brittle and prone to cracking. It also lowers battery output, causing low-voltage TCCM faults during startup.

How to Talk to a Mechanic About This Code

Say this: "I have a 'Service 4WD' light and a C0382 code. I'd like to schedule a diagnostic. Please start by inspecting the TCCM ground connection and testing the dashboard selector switch before quoting a full encoder motor replacement."

This signals you are an informed customer. It directs the mechanic to perform proper electrical diagnosis for common, cheaper fixes first, preventing them from defaulting to the most expensive component.

Avoid saying:

• 'My 4WD isn't working, just fix it.'
• 'The light is on, can you just look at it?'
• 'I think I need a new transfer case motor.'

Questions to ask before authorizing the repair:

• Did you test the TCCM ground and check for voltage drop?
• Did you test the 5V reference, ground, and signal wires at the position sensor connector?
• Is the fault electrical (wiring/sensor) or mechanical (motor/gear)?
• Can you provide a written estimate that breaks down parts and labor costs?
• What is the warranty on the recommended parts and your labor?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Recommended only if TCCM programming is needed or the vehicle is under warranty. Otherwise, an independent shop is more cost-effective.
  Best for: Vehicles under warranty, Very new models (2022+) with potential TSBs, Complex jobs requiring TCCM programming
  Downsides: Highest labor rates, Dealers prefer replacing entire assemblies rather than repairing wiring. (Typical cost: +50% vs. baseline)
• Independent Shop: Best fit for most C0382 repairs. A good independent shop diagnoses electrical faults more affordably than a dealer.
  Best for: Out-of-warranty vehicles, especially common GM trucks., Electrical diagnosis and wiring repairs.
  Downsides: Quality varies; look for ASE certifications., May lack manufacturer-specific programming tools for brand new models. (Typical cost: +0% vs. baseline)
• Chain Shop: Avoid for intermittent electrical problems or if the cause isn't obvious, as misdiagnosis is highly likely.
  Best for: Simple, clear-cut part replacements like a faulty 4WD selector switch.
  Downsides: Technician experience with complex electrical diagnosis is inconsistent., Often lack advanced scan tools needed to view TCCM live data. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost exceeds 40-50% of the vehicle's private-party value, consider selling it as-is or trading it in.

• Car worth $8000, fix is $750: Fix it. This repair is well below the threshold and restores a critical function of the vehicle.
• Car worth $4000, fix is $2500: Walk away. A transfer case replacement on a lower-value truck is not economical. The repair cost is over 60% of the vehicle's value.
• Car worth $5000, fix is $2000: Borderline. A $2,000 repair is 40% of the vehicle's value. Get a second opinion before proceeding.

What Scan Tool You Need for This Code

Minimum: A scanner that reads Chassis (C) codes. A basic engine-only code reader will NOT see code C0382.

A cheap powertrain-only scanner cannot communicate with the Transfer Case Control Module (TCCM), making it impossible to read or clear the code.

Budget: BlueDriver Pro (~$90) — Reads and clears chassis codes, views live data from the TCCM to watch sensor voltage, and provides freeze-frame data.

Mid-range: Foxwell NT510 Elite (~$150) — Offers enhanced live data graphing and bi-directional controls to command the transfer case to shift, isolating a bad motor from a bad sensor.

Professional: Autel MaxiCOM MK808 (~$450) — Provides full bi-directional control, OEM-level diagnostics, and advanced coding functions for module replacement (like a new TCCM).

Rent vs buy: For a one-time fix, auto parts stores offer free scans with capable tools. If you DIY regularly, buying a midrange scanner is a worthwhile investment.

How to Clear the Code After You Fix It

1. Perform the physical repair (e.g., replace sensor, clean ground).
2. Use a chassis-capable OBD-II scan tool to erase DTCs from the TCCM.
3. Perform the manufacturer's transfer case relearn procedure if a new motor or TCCM was installed.
4. Complete a full drive cycle to verify the code remains clear and set emissions monitors.

Drive cycle (~20 minutes): From a cold start, idle for 3 minutes with electrical loads on. Accelerate to 55 mph and hold a steady speed for 5 minutes. Coast down to 20 mph without braking. Accelerate to 60 mph and hold for 5 minutes. Cool down.

Readiness monitors affected: Catalyst Monitor, EVAP System Monitor, O2 Sensor Monitor, O2 Sensor Heater Monitor

Before emissions retest: drive at least 50 miles to fully set monitors.

Watch out for:

• Clearing the code without fixing the electrical fault causes the code to return immediately upon the next key cycle.
• Disconnecting the battery clears the light temporarily but resets all emissions readiness monitors, guaranteeing an emissions test failure.

Will This Fail Emissions / State Inspection?

No — by itself this code doesn't fail OBD inspection (but it can keep readiness monitors from setting, which causes a separate fail).

• California: A 'Service 4WD' light does not cause a Smog Check failure. However, clearing C0382 resets emissions readiness monitors. You cannot pass until a complete drive cycle sets the monitors to 'Ready'.
• New York: NYS inspections check for illuminated dashboard malfunction lights. While the focus is the Check Engine Light, an inspector can fail the vehicle for a 'Service 4WD' light. Clearing the code requires a drive cycle before passing.
• Texas: C0382 does not directly fail the OBD-II emissions test, but clearing it requires driving 50-100 miles to reset the monitors before you can pass.

Most Commonly Affected Vehicles

• Chevrolet Silverado 1500/2500HD (2003-2007) — Extremely common issue caused by the G110 ground wire on the frame under the driver's door or a failed encoder motor position sensor.
• GMC Sierra 1500/2500HD (2003-2007) — Shares the exact platform and 4WD system as the Silverado, suffering identical ground wire and encoder sensor failures.
• Chevrolet Tahoe / Suburban / Avalanche (2003-2007) — Utilizes the same 4WD components as the trucks, including the problematic push-button selector switch and encoder motor.
• Chevrolet / GMC Trailblazer / Envoy (2002-2009) — Highly susceptible to encoder motor and position sensor failures, frequently setting codes C0327 and C0382.
• Dodge Ram 1500/2500 (2002-2010) — Experiences frequent failures of the transfer case shift motor. The 2006-2010 models often use the NVG246 transfer case.
• Ford F-150 (2004-2014) — Presents with a 'Check 4x4' light due to shift motor faults. Grinding noises are often misdiagnosed as transfer case issues when the true cause is an IWE vacuum leak.

Manufacturer-Specific Notes

• General Motors (Chevrolet/GMC): A corroded ground connection (G110) on the frame under the driver-side door is the #1 cause for this code on 2003-2007 trucks. Cleaning this ground is mandatory before replacing parts.
• General Motors (Chevrolet/GMC): On 2019-2023 models, TSB 22-NA-187 addresses water intrusion into the transfer case actuator harness connector. The fix requires replacing the connector with repair kit P/N 19369184.
• Ford: On 2004-2014 F-150s, front-end grinding is frequently misdiagnosed as a C0382 transfer case issue. The actual cause is usually a loss of vacuum to the Integrated Wheel End (IWE) actuators.
• Ram (Dodge): TSB 08-237-23 for 2023 Ram 1500s notes that a 'Service 4WD' light is caused by an unseated connector at the shift motor. A simple push-pull test secures the connection.

Real Owner Stories

2005 Chevy Silverado 1500 - The $0 Ground Wire Fix

The 'Service 4WD' light appeared intermittently, especially after rain. The 4WD system refused to engage.

What they tried:

1. Assumed the encoder motor failed.
2. Researched common GM truck issues.
3. Located the G110 ground wire on the frame under the driver's door.

Outcome: The ground connection was heavily corroded. The owner cleaned the wire terminal and frame to bare metal, applied dielectric grease, and re-secured it. The code cleared permanently for $0.

Lesson: Always clean the main TCCM frame ground on GM trucks before buying expensive parts like the encoder motor.

2006 GMC Envoy - Misdiagnosed Encoder Motor

Codes C0327 and C0382 were present. A shop quoted $700 for a new transfer case encoder motor.

What they tried:

1. Sought a second opinion and tested the dashboard 4WD selector switch with a multimeter.
2. Found the switch's resistance values were erratic when pressing '4HI'.

Outcome: Replaced the 4WD selector switch for $60. The light stayed off and 4WD functions were fully restored.

Lesson: A faulty $60 dash switch sends bad signals to the TCCM, triggering codes that mimic a $700 encoder motor failure. Test the switch first.

2004 Chevy Trailblazer - The Wiggle Test Success

The 'Service 4WD' light flashed randomly for months. Replacing the encoder motor and cleaning grounds did not fix it.

What they tried:

1. Connected a scan tool to monitor the encoder sensor's live voltage.
2. Systematically wiggled the wiring harness running from the TCCM to the transfer case.

Outcome: Sensor voltage dropped to zero when the harness was moved near the crossmember. A wire had chafed through its insulation against the frame. Splicing the wire fixed the issue permanently.

Lesson: For intermittent electrical faults, a 'wiggle test' while watching live scanner data is the only way to find hidden wire breaks.

2008 Dodge Ram 1500 - Stripped Internal Gear

4WD would not engage, and selector lights blinked. The owner heard a clicking sound from the transfer case, but the shift failed.

What they tried:

1. Verified fuses and wiring.
2. Removed and opened the transfer case shift motor casing.

Outcome: A plastic gear connecting the electric motor to the shift shaft had broken teeth. The motor spun, but couldn't turn the shaft. Replacing the encoder motor assembly resolved it.

Lesson: If the motor clicks but the shift fails, the internal mechanical gears inside the encoder motor are likely stripped.

How to Prevent This Code From Triggering

• Clean and protect the TCCM frame ground. (Every 2 years in salt-belt regions.) — Prevents corrosion at the most common failure point (GM's G110 ground). Sanding to bare metal and applying dielectric grease ensures solid electrical contact.
• Change the transfer case fluid. (Every 30,000-60,000 miles.) — Clean fluid lubricates internal gears and shift forks, preventing mechanical binding that strains and burns out the electric shift motor.
• Engage the 4WD system periodically. (Once a month for 2 miles.) — Activates the shift motor and lubricates internal seals, preventing the actuator mechanisms from seizing due to inactivity.
• Rinse the vehicle's undercarriage after winter storms. (As needed.) — Washes away road salt that accelerates corrosion on the encoder motor housing, wiring connectors, and frame grounds.

Frequently Asked Questions

Can I still drive my truck with code C0382?

Yes, you can drive, but the 4WD system is disabled. The vehicle operates safely in 2WD mode. Repair it before you need 4WD for poor weather or off-road conditions.

What is the most common misdiagnosis for C0382?

The most common misdiagnosis is replacing the $400 transfer case encoder motor without checking electrical connections. Technicians often overlook the corroded TCCM ground wire on GM trucks, which is a free fix. Always verify fuses and grounds first.

My 'Service 4WD' light comes on and off intermittently. What could it be?

Intermittent faults stem from poor electrical connections. Suspect a loose TCCM ground wire, a backed-out connector pin, or a chafed wire shorting against the frame. Perform a 'wiggle test' on the harness while monitoring live scanner data to pinpoint the break.

Is fixing code C0382 expensive?

Costs range from $0 to $750 depending on the root cause. Cleaning a corroded ground wire costs nothing, while replacing a dashboard switch costs around $100. Replacing the transfer case encoder motor or TCCM ranges from $400 to $750 including labor.

Can a bad battery cause a C0382 code?

Yes, a weak battery causes voltage drops during engine cranking that confuse the TCCM. This triggers false C0382 codes even if the 4WD components are perfectly fine. Always test your battery and alternator before diagnosing complex electrical faults.

What is a transfer case encoder motor?

The encoder motor is a small electric motor mounted on the transfer case that physically shifts the gears. It contains a position sensor (the 'encoder') that reports the current gear back to the computer. They are typically replaced as a single assembly.

I fixed the problem, can I just clear the code C0382?

Yes, you can clear the code using an OBD-II scanner after completing the repair. However, clearing the code without fixing the root cause is useless. The 'Service 4WD' light will return immediately once the TCCM runs its next self-test.

Key Takeaways

• Code C0382 disables your 4WD system because the Transfer Case Control Module (TCCM) cannot verify the transfer case's current gear position.
• For 2003-2007 GM trucks and SUVs, clean the G110 frame ground under the driver's door before spending money on parts; this $0 fix resolves over 50% of C0382 codes.
• A blinking 4WD selector light indicates the TCCM commanded a shift but the encoder motor failed to confirm it, pointing directly to a faulty motor or sensor.
• Never replace the $400 transfer case encoder motor without first testing the $40 dashboard selector switch with a multimeter.