U1424 on 2007-2017 Jeep Compass: Implausible Engine Torque Signal Causes and Fixes

What's Unique About the 2007-2017 Jeep Compass

The first-generation Jeep Compass shares its platform (MK) and powertrains with the Jeep Patriot and Dodge Caliber. On these vehicles, the U1424 code is very frequently associated with issues related to the electronic throttle body, often appearing with codes U1407 and U1425. 🎬 Watch this video on fixing these three codes together While software updates are a common fix for this code across the Jeep lineup, for the Compass/Patriot/Caliber, a dirty or failing throttle body is a highly probable root cause that should be investigated early in the diagnostic process.

Symptoms You May Notice

• Check Engine Light is on
• Electronic Throttle Control (ETC) or 'lightning bolt' light is flashing
• Vehicle enters 'limp mode' with severely limited power
• No throttle response (gas pedal does nothing)
• Engine stalling, especially when coming to a stop
• Rough or erratic shifting
• Traction control light may illuminate

Most Likely Causes

1. Dirty or Failing Electronic Throttle Body 🔴 High Probability → Shop Fuel Injection Throttle Body Carbon and gunk buildup around the throttle plate is common, causing it to stick. This creates a mismatch between the commanded throttle position and actual airflow, confusing the torque calculation.
   How to confirm: Inspect the throttle body bore and plate for carbon buildup. If cleaning doesn't resolve the issue, and codes like P2101 or P2110 appear, the internal electronics may have failed. Multiple owner videos show cleaning as a successful first step.
   Typical fix: First, attempt to clean the throttle body thoroughly with a dedicated throttle body cleaner and a soft brush/rag. If symptoms persist, the entire throttle body assembly must be replaced. One owner on YouTube documented this exact scenario, replacing the part after cleaning was insufficient. 🎬 See this step-by-step throttle body replacement walkthrough
   Est. part cost: $10-$20 (cleaner), $150-$300 (replacement assembly)
2. Outdated Powertrain Control Module (PCM) Software 🔴 High Probability → Shop Engine Control Module (ECM) Chrysler/Jeep frequently releases software updates to correct overly sensitive diagnostic logic that can falsely trigger a U1424 code.
   How to confirm: A Jeep dealership or a qualified shop with a wiTECH scan tool must check the current software calibration ID against the latest available version from Jeep.
   Typical fix: Reprogramming (flashing) the PCM and sometimes the TCM to the latest software version. TSB 18-084-15 specifically notes that the TCM must also be updated after the PCM flash. This is a dealer or specialty shop repair.
   Est. part cost: $0 (if under warranty/recall), $150-$300 (shop labor for flashing)
3. Failing Crankshaft or Camshaft Position Sensor 🟡 Medium Probability → Shop Engine Camshaft Position Sensor These sensors provide the fundamental engine speed and position data for all PCM calculations. An erratic signal from a failing sensor, especially when the engine is warm, directly corrupts the torque calculation, making U1424 a secondary code.
   How to confirm: Scan for other trouble codes. This issue will almost always be accompanied by a specific sensor code, such as P0335/P0339 (Crankshaft) or P0340/P0344 (Camshaft). Diagnose the specific sensor code first. Symptoms include stalling when warm and crank-no-start conditions.
   Typical fix: Replace the specific sensor indicated by the accompanying trouble code. Accessing the crankshaft sensor is difficult, often requiring removal of a heat shield from below the vehicle. 🎬 Watch how to replace the crankshaft position sensor
   Est. part cost: $30-$80
4. Weak Battery or Poor Ground Connections ⚪ Low Probability Jeep control modules are sensitive to low voltage. A weak battery can cause communication glitches between modules during startup, triggering various network ('U') codes.
   How to confirm: Test the battery with a professional load tester (a simple voltage check is not sufficient). Inspect battery terminals and the main engine/chassis ground straps for corrosion or looseness.
   Typical fix: Replace the weak battery and clean all corroded connections.
   Est. part cost: $150-$250

Rare But Worth Checking

• Damaged PCM Connector or Wiring: In at least one documented case on a 2011 Compass, the issue was traced to a bad pin/connection at the PCM connector after other parts were replaced. This is worth checking if you've recently disconnected the PCM.
• Wiring Harness Chafing: The engine wiring harness can rub against brackets or other components, eventually wearing through the insulation and causing a short. A thorough visual inspection of the harness, particularly around the engine and transmission, is warranted if other causes are ruled out.

Diagnosis Steps

1. Scan for all codes in all modules. Pay close attention to any other codes that accompany U1424. Prioritize diagnosing sensor-specific (P0335, P0340) or throttle-related (U1407, U1425) codes first.
2. Check the engine oil level, especially if you have the 2.4L engine. Low oil can cause performance issues that trigger this code. TSB 18-081-19 links U1424 with oil consumption issues on some Jeep models.
3. Test the battery and charging system. Ensure voltage is stable and connections are clean and tight.
4. Inspect and clean the Electronic Throttle Body. Remove the air intake duct and thoroughly clean the throttle plate and bore with a dedicated cleaner and a soft, lint-free rag.
5. Perform a throttle relearn procedure after cleaning. A common method is: Turn the key to 'On' (do not start). Wait for all chimes/lights to stop. Slowly press the gas pedal all the way to the floor. Slowly release it. Turn the key 'Off'. Start the engine.
6. If the problem persists, contact a Jeep dealer or qualified shop to check for any available PCM/TCM software updates (TSBs). This is a very common fix.
7. If software is up-to-date and the issue remains, perform detailed diagnostics on the component indicated by any other stored codes (e.g., test the crankshaft sensor circuit).

Parts You'll Likely Need

• Electronic Throttle Body Assembly (OEM #04891735AC (superseded by 4891735AD, 68420395AB)) — This is a primary cause of U1424 on this platform, especially when cleaning the original unit does not resolve the limp mode and associated codes.
  Trusted brands: Mopar, Standard Motor Products (SMP), Hitachi
  OEM price range: $250-$350
  Aftermarket price range: $150-$250
• Crankshaft Position Sensor (OEM #5033307AB) — If code P0335 is also present, this sensor is the root cause. Its failure provides bad data to the PCM, which then triggers U1424 as a secondary fault.
  Trusted brands: Mopar, Denso, NGK/NTK
  OEM price range: $50-$90
  Aftermarket price range: $30-$60
• Camshaft Position Sensor — If code P0340 or P0344 is present, this sensor is the root cause. Like the crank sensor, its failure leads to the U1424 code.
  Trusted brands: Mopar, Delphi, Bosch
  OEM price range: $40-$70
  Aftermarket price range: $25-$50

Related Codes That Often Appear With This One

• U1407 — Implausible Engine Torque Request Signal Received. This is a closely related network code often set with U1424, pointing strongly to a throttle body or software issue.
• U1425 — Implausible Pedal Position Signal Received. This code, when seen with U1424, reinforces that the fault lies within the throttle control system.
• P0335 / P0340 — Crankshaft/Camshaft Position Sensor Circuit. A fault in these sensors is a direct cause for the PCM to calculate an implausible torque value, making U1424 a symptom code.
• P0300-P0304 — Cylinder Misfire. An engine misfire causes erratic crankshaft speed, which the PCM can interpret as an implausible torque signal. The misfire is the root cause. TSB 18-081-19 links these codes directly to U1424.

Technical Service Bulletins (TSBs) & Recalls

• 18-084-15 REV. A: Addresses U1424 on 2.4L engines and involves reprogramming the PCM. It also notes that the TCM must be updated to the latest software after the PCM flash is complete.
• 18-081-19: Links U1424 with misfires (P0300-P0304) and oil consumption on 2.4L engines, recommending a PCM software update.

Mechanic-Grade Diagnostic Values

• Throttle Position Sensor (TPS) Signal Voltage at Idle (Throttle Closed) — expected: ~0.5V to 0.7V. Failure: Voltage is significantly higher (e.g., >0.9V) or 0V, indicating a sensor or wiring fault.
• Throttle Position Sensor (TPS) Signal Voltage at Wide-Open Throttle (WOT) — expected: ~4.5V to 5.0V. Failure: Voltage does not increase smoothly or fails to reach the expected range, indicating dead spots or a faulty sensor.
• 5-Volt Reference at Throttle Body Connector — expected: Approximately 5.0V with key on, engine off.. Failure: Voltage is absent or significantly lower, indicating a problem with the PCM or the wiring between the PCM and throttle body.
• Ground Circuit at Throttle Body Connector — expected: Good continuity to chassis ground (near 0 ohms).. Failure: High resistance or an open circuit indicates a broken ground wire or poor connection at a ground point.

Hidden / Shadow Codes Worth Checking

• U1424-00: This is the full code format often displayed on dealer-level scan tools. The '-00' suffix is a standard failure type code indicating a general or component failure, which doesn't add new diagnostic information but confirms the fault type. (see via Chrysler/Jeep's wiTECH scan tool or other high-level aftermarket scanners.)

Scan Tool Commands That Help

• wiTECH: Reprogram PCM / Flash ECU — This is the primary step when a Technical Service Bulletin (TSB) indicates a software update is available to fix overly sensitive diagnostic logic that triggers a false U1424 code.
• wiTECH: Learn ETC (Electronic Throttle Control) — This function is required after replacing the electronic throttle body or reprogramming the PCM to recalibrate the throttle plate's closed, open, and idle positions.
• wiTECH or advanced aftermarket scanner: View All DTCs / Vehicle Scan — Essential first step to see which other modules (TCM, ABS, BCM) have stored the U1424 code and to identify any primary codes (e.g., P0335, P0340) that are the root cause.

Wiring & Ground Locations

• PCM Connector C2 — The Powertrain Control Module (PCM) is located on the driver's side of the engine bay, near the fuse box (TIPM). C2 is one of the large multi-pin connectors plugging into it.. This connector contains the critical wiring for the Electronic Throttle Control (ETC) motor and the Throttle Position Sensors (TPS). A poor connection here can directly cause U1424.
• PCM C2, Pin 65 (TP SENSOR RETURN) — On the C2 connector at the PCM.. This is the shared sensor return (ground) for the throttle position sensors. A fault on this specific pin or wire (BN/DB - Brown/Dark Blue) can cause implausible TPS readings.
• PCM C2, Pin 62 (CMP SIGNAL) — On the C2 connector at the PCM.. This pin receives the signal from the Camshaft Position Sensor. A wiring issue here can mimic a failed sensor and lead to U1424.
• Main Fuse Box (TIPM) — Located on the driver's side of the engine bay, just behind the battery.. The Totally Integrated Power Module (TIPM) houses the fuses and relays that supply power to the PCM and other modules. While less common for this specific code, TIPM failures can cause a wide range of electrical issues, including communication faults. A related code, P0688 (ASD Main Sense Circuit), points directly to a fault within the TIPM.

Real Owner Repair Stories

• Dad Who Does on YouTube (2011 Jeep Compass 2.4L) — Codes U1407, U1424, U1425; Electronic Throttle Control 'lightning bolt' light on; traction control light on; vehicle enters limp mode with no acceleration.
  ❌ Tried (didn't work) Cleaning the throttle body (implied as a common first step that was insufficient).
  ✅ What actually fixed it Complete replacement of the electronic throttle body assembly (Part #04891735AC). After replacement, all codes were cleared and the issue was resolved.
• CarComplaints.com user report (2011 Dodge Caliber (platform-mate)) — ETC light comes on, loss of power at low and high RPMs, rough idle. Codes U1407, U1424, U1425.
  ❌ Tried (didn't work) Not specified, but the user was reporting the problem as ongoing.
  ✅ What actually fixed it This is a report of the problem, not a fix, but it serves as strong evidence that the exact same cluster of codes (U1407, U1424, U1425) and symptoms affect the Dodge Caliber, confirming the issue is platform-wide.
• LarryTheMechanic on YouTube (2014 Jeep Patriot 2.0L (platform-mate)) — 'Thunderbolt' (ETC) light, traction control light, check engine light, vehicle in limp mode. Codes U1407, U1424, U1425.
  ❌ Tried (didn't work) The video presents cleaning as the first and only step.
  ✅ What actually fixed it Thoroughly cleaning the carbon and gunk from the throttle body plate and bore using dedicated throttle body cleaner, a soft brush, and a microfiber towel. After cleaning and clearing the codes, the problem was solved.

OEM Part Supersession History

• 04891735AC → 4891735AD, which was then superseded by 68420395AB. — Standard part revisions for improved reliability or manufacturing changes.
  Heads up: All part numbers in this chain are interchangeable for the specified 1.8L, 2.0L, and 2.4L engines in the Compass/Patriot/Caliber platform.

Model Year Variations Within This Range

• 2014-2017: For the 2.4L engine, some later models (approx. 2014+) were equipped with a 6-speed automatic transmission (6F24) instead of the Continuously Variable Transmission (CVT) found in earlier models. While the U1424 code's primary causes (throttle body, software, sensors) remain the same, the communication partner (TCM) is different. Diagnostics should confirm if the fault is logged in the 6-speed's TCM.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Front and Rear Subframe Corrosion 🔴 High — Very common, especially in salt-belt regions. Can become structurally unsafe. An extended warranty was offered by Chrysler for some model years, but has since expired for most vehicles. (Ref: Warranty Extension (e.g., X14 for 10 years) but not a formal recall.)
• CVT Transmission Overheating and Failure 🔴 High → Shop Transmission Assembly — Common on models equipped with the Jatco CVT. Symptoms include whining, loss of acceleration, and overheating warnings. Failure often occurs between 70,000 and 120,000 miles.
• Suspension Component Wear 🟠 Medium — Premature failure of lower control arms, ball joints, and tie rods is frequently reported, sometimes under 60,000 miles, leading to clunking noises and poor alignment.
• Water Leaks into Cabin 🟡 Low — Leaks from the sunroof drains, tailgate seals, or roof rack mounting points are a common annoyance, potentially leading to wet headliners and floor carpets.
• Totally Integrated Power Module (TIPM) Failure 🔴 High — More common on early (2007-2008) models, a failing TIPM can cause a wide array of bizarre electrical issues, including engine stalling, fuel pump problems, and starter issues.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used Electronic Throttle Body from a junkyard is a reasonable option for this repair, especially as a diagnostic step. Since the failure is often electronic or due to wear in the internal gears, a low-mileage donor part can be a cost-effective fix.

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

What to inspect on the donor part:

• Verify the part number (04891735AC or its successors) matches.
• Inspect the connector pins for any corrosion or damage.
• Manually (and gently) move the throttle plate; it should move smoothly with some spring resistance and not feel gritty or stuck.
• Ask for the donor vehicle's mileage if possible; lower is always better.

OEM-only on this vehicle (don't cheap out):

• Powertrain Control Module (PCM). While PCM failure is rare, if replacement is needed, a new or professionally remanufactured OEM unit is required due to the need for VIN programming and software flashing.

Aftermarket brands forum-validated for this vehicle:

• Standard Motor Products (SMP)
• Hitachi

Brands owners have reported issues with on this vehicle:

• Unbranded, ultra-low-cost units from online marketplaces may have questionable quality control and a higher failure rate. While one was shown to work in a YouTube video, OEM or known-quality aftermarket brands are a safer long-term bet.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• U1407 — Often appears alongside U1424 as part of a cluster of network codes related to implausible throttle or torque data.
• U1425 — A companion code frequently triggered by the same throttle body carbon buildup or electronic failure as U1424.
• P2101 — Indicates a throttle body performance issue; if this appears with U1424, it confirms the internal electronics of the throttle assembly are likely failing.
• P2110 — Electronic Throttle Control system forced limited RPM; often the reason the vehicle enters 'limp mode' when U1424 is present.
• P0335 — Crankshaft Position Sensor circuit malfunction; an erratic signal from this sensor can corrupt torque calculations and trigger U1424.
• P0300 — Random or multiple cylinder misfire; linked to U1424 in TSB 18-081-19 regarding 2.4L engine oil consumption and software issues.
• P0340 — Camshaft Position Sensor circuit malfunction; provides fundamental engine speed data that, if erratic, causes U1424 to trigger as a secondary code.

Frequently Asked Questions