P0700 on 2013-2016 Dodge Dart: Transmission Control System Fault Causes and Fixes

What's Unique About the 2013-2016 Dodge Dart

The 2013-2016 Dodge Dart, particularly models with the 1.4L Turbo engine and Dual Dry-Clutch Transmission (DDCT C635), is known for transmission-related issues. A significant number of these problems, which trigger the P0700 code, are linked to a faulty Transmission Control Module (TCM). A recall (NHTSA ID 15V-508, FCA Recall R42) was issued for the 2013-2015 Dart because a TCM mounting bracket could damage the module's circuit board, leading to an unexpected shift to neutral. Owner complaints frequently cite TCM failure leading to symptoms like the 'gear not available' message, blinking gear indicator on the dash, and the vehicle getting stuck. Another common issue is the failure of the hydraulic valve body unit, which contains internal sensors that can fail when hot, leading to shifting problems.

Symptoms You May Notice

• Check Engine Light is on
• Transmission warning light on the dashboard
• Message on dash: 'Service Transmission', 'Gear Not Available'
• Blinking gear selection indicator on the dash
• Harsh, erratic, or delayed shifting
• Vehicle unexpectedly shifts into neutral
• Vehicle gets stuck in one gear ('limp mode')
• Inability to shift into Drive or Reverse
• Vehicle stalls or runs poorly
• Decreased fuel economy

Most Likely Causes

1. Failing Transmission Control Module (TCM) 🔴 High Probability → Shop Transmission Assembly A recall (NHTSA 15V-508 / FCA R42) was issued for 2013-2015 models due to a faulty mounting bracket that could damage the TCM. The part is a well-documented failure point for this platform, with many owner complaints of sudden failure, especially on DDCT models.
   How to confirm: Use an advanced scan tool to check for communication with the TCM and for specific TCM-related fault codes (like U0101 - Lost Communication with TCM, or P0613 - TCM Processor Fault). If P0700 appears alone with no other codes, or the scanner cannot communicate with the TCM at all, it strongly points to an internal TCM failure or a power/ground issue to the module.
   Typical fix: Replacement of the Transmission Control Module. 🎬 Watch: Step-by-step guide to removing and replacing the TCM The new module must be programmed to the vehicle's VIN using a dealer-level scan tool like wiTECH. This includes performing a 'PROXI Configuration Alignment' and 'VIN Verification' routine.
   Est. part cost: $200-$600
2. Faulty Transmission Shift Cable Bushing 🟡 Medium Probability → Shop Transmission Assembly A recall (NHTSA 19V-293 / FCA V34) was issued for 2013-2016 Darts because the shifter cable bushing can degrade and fail, causing the cable to detach from the transmission. This recall was later investigated by NHTSA and re-issued because the initial replacement bushings were also failing prematurely.
   How to confirm: The gear shifter moves freely but the gear indicator on the dash (PRNDL) doesn't change or doesn't match the shifter position. The vehicle may not go into Park or may roll away. The PRNDL display on the Dart shows the actual gear the transmission is in, not the shifter position, so a mismatch is a key symptom.
   Typical fix: Replace the shifter cable bushing. 🎬 See how to easily replace the shift linkage bushing yourself This is a recall item, so a dealer should perform the repair for free. Aftermarket kits like the Dorman 14057 are also available for DIY repair.
   Est. part cost: $10-$30
3. Failing Hydraulic Valve Body / Actuator Unit (DDCT) 🟡 Medium Probability → Shop Transmission Valve Body On the 1.4L DDCT transmission, the hydraulic unit that controls shifting contains integrated sensors (like the range sensor and shift position sensors) that are known to fail, especially when the transmission heats up. This is often misdiagnosed as a complete transmission failure.
   How to confirm: Scan the TCM for specific sensor codes related to shift position (e.g., P1C99 - Gear Shift Position Sensor 1 Circuit). Symptoms often appear or worsen after the car has been driven for a while and the transmission is warm. A technician may need to depressurize the hydraulic circuit with a scan tool before removal.
   Typical fix: Replacement of the hydraulic valve body assembly (also called the 'smart drive unit'). This part is located on the front of the DDCT transmission. While the part itself can be replaced, it can be expensive and difficult to source.
   Est. part cost: $300-$2200
4. Low or Dirty Transmission Fluid ⚪ Low Probability → Shop Transmission Assembly
   How to confirm: Check the transmission fluid level and condition. The fluid should be at the correct level and have a clean, bright red appearance. Note that the DDCT transmission does not have a traditional dipstick and checking the level is a more involved process. The C635 DDCT has two separate fluids: a hydraulic fluid for the actuators and gear oil for the transmission itself.
   Typical fix: Perform a transmission fluid and filter change. Use only the fluid specified by the manufacturer (Mopar C635 DDCT Fluid for the dual-clutch).
   Est. part cost: $50-$200

Rare But Worth Checking

• Internal Transmission Failure: → Shop Transmission Assembly While less common than electronic issues, mechanical wear on the dual-clutch assembly or internal gears can cause catastrophic failure, often accompanied by loud noises and metal shavings in the fluid.
• Wiring Harness Issues: Corroded connectors or damaged wires between the TCM and transmission can interrupt communication and trigger faults. Check for stable power and ground at the TCM connector before condemning the module.

Diagnosis Steps

1. Connect an OBD-II scanner capable of reading Transmission Control Module codes. Basic scanners will only show P0700.
2. Record the P0700 code and any other stored codes from both the ECM and TCM. Codes like U0101 or other P07xx codes are the key to the diagnosis.
3. If other codes are present, prioritize diagnosing those specific faults as they are the root cause.
4. Check for open recalls using the vehicle's VIN. Recalls R42 (TCM Bracket) and V34 (Shifter Bushing) are particularly relevant and may provide a free repair.
5. If a shifter bushing failure is suspected, check if the shifter moves without changing the gear indicated on the dash.
6. Inspect the transmission fluid level and condition, if possible. Dark, burnt, or low fluid indicates a problem. The DDCT has separate hydraulic and gear fluids.
7. Visually inspect the wiring harness and connectors going to the TCM and transmission for any signs of damage, corrosion, or loose connections.
8. If the TCM is suspected, verify it has stable power and ground connections with a multimeter before condemning the module. A service manual indicates checking for opens or shorts on specific circuits, like the sensor ground circuits (T191, T192).
9. After any repairs (especially TCM or valve body replacement), a transmission quick-learn or re-adaptation procedure using a compatible scan tool 🎬 Watch: How to perform a transmission relearn on the 1.4L (like wiTECH) is often required.
10. Clear all codes and perform a drive cycle to ensure the fault does not return.

Parts You'll Likely Need

• Transmission Control Module (TCM) (OEM #68210293AA (for 1.4L DDCT), 68258732AC (for 2.4L Auto). Part numbers are often superseded; always verify with VIN.) — This is the most frequent point of failure for transmission issues on the 2013-2016 Dart, often causing a P0700 code, especially on DDCT models.
  Trusted brands: Mopar
  OEM price range: $400-$700
  Aftermarket price range: $250-$450
• Transmission Shifter Cable Bushing — A known failure point covered by a recall. If it fails, the car may not shift into the correct gear or may not go into Park. The recall fix itself has been known to fail.
  Trusted brands: Mopar, Dorman (e.g., part #14057)
  OEM price range: $10-$20
  Aftermarket price range: $5-$15
• Hydraulic Valve Body Actuator (DDCT) — For the 1.4L DDCT, this unit contains sensors that are a common failure point, leading to 'Gear Not Available' messages and shifting problems when hot.
  Trusted brands: Mopar
  OEM price range: $1500-$2200

Related Codes That Often Appear With This One

• U0101 — Indicates a loss of communication with the TCM, often pointing directly to a failed TCM, a wiring issue, or a problem with the TCM's power supply.
• P0613 — This code means 'TCM Processor Fault' and is a strong indicator that the TCM itself has an internal failure.
• P07xx — Any other P07xx series code (e.g., P0717, P0721, P0758) points to a specific fault within the transmission, such as a sensor or solenoid circuit, which the P0700 code is reporting.

Technical Service Bulletins (TSBs) & Recalls

• NHTSA Recall 15V-508 (FCA R42): Transmission Control Module failure.
• NHTSA Recall 19V-293 (FCA V34): Transmission Shift Cable Bushing failure.
• TSB 21-024-16: A software flash for the TCM to address drivability and shift enhancements.
• TSB 21-013-16 REV. A: Details the transmission 'Quick Learn' procedure required after replacing a TCM or valve body on certain FCA vehicles.
• Manufacturer Bulletin #S2321000006: Notes that a "Service Transmission" message illumination and DTC P0700-E4 (Transmission Control System MIL Request) may set.

Platform-Specific Known Issues

• Recall R42 (NHTSA 15V-508): Affects 2013-2015 Darts with DDCT. The TCM mounting bracket could allow water intrusion or vibration to damage the TCM's circuit board, causing the transmission to shift into neutral unexpectedly.
• Recall V34 (NHTSA 19V-293): Affects 2013-2016 Darts with automatic transmissions. The shifter cable bushing can fail, leading to a loss of park function and potential rollaway. This recall was later investigated and re-issued (Recall A0C) because the initial fix was insufficient.

Mechanic-Grade Diagnostic Values

• Voltage on 2-4 Position Sensor Signal Circuit (T47) — expected: Less than 0.5 V with ignition on, engine off, and sensor disconnected.. Failure: Voltage greater than 0.5 V indicates a short to voltage in the circuit.
• Resistance of Sensor Ground Circuits (T191 and T192) — expected: Below 5.0 Ohms between the position sensor connector and the TCM C2 harness connector.. Failure: Resistance above 5.0 Ohms indicates an open in the ground circuit.
• Power Supply at TCM Connector — expected: 12.0 - 12.6 V with ignition on.. Failure: Low or no voltage indicates a power supply issue to the module, not necessarily an internal TCM fault.

Hidden / Shadow Codes Worth Checking

• P1C99: Gear Shift Position Sensor 1 Circuit. This is a manufacturer-specific code that points to a fault within the integrated sensor module inside the DDCT's hydraulic actuator unit. (see via Requires an advanced scan tool capable of reading proprietary Chrysler/Dodge transmission codes, such as a dealer's wiTECH tool or a high-end aftermarket scanner.)

Scan Tool Commands That Help

• wiTECH or equivalent (Autel, Launch): TCM Quick Learn — This procedure is mandatory after replacing the TCM or disconnecting the battery for an extended period. It allows the TCM to relearn clutch engagement points and shift adaptations. Failure to perform this can result in no-move conditions or harsh shifting.
• wiTECH: PROXI Configuration Alignment — Required after installing a new TCM to ensure it communicates correctly with all other vehicle modules on the CAN bus network. This synchronizes the vehicle's configuration data across all modules.
• wiTECH: VIN Verification — After installing a new TCM, its VIN must be programmed to match the vehicle's VIN. This is a critical step for the module to function.
• wiTECH or equivalent (Autel): Depressurize Hydraulic Circuit — Before removing the hydraulic valve body/actuator unit on the DDCT, this function pumps fluid back into the reservoir to prevent spills and pressure release.

Wiring & Ground Locations

• Transmission Control Module (TCM) — Inside the cabin, on the passenger side, behind the carpet at the front where the passenger's feet would rest.. This is the brain of the transmission. Knowing its location is critical for checking connections, testing power/ground, and replacement. Its interior location protects it from engine heat but makes access more difficult.
• G105 — Left front corner of the engine compartment.. This is a primary ground point for components in the engine bay. A loose or corroded G105 can cause various electrical issues, including communication faults with the TCM.
• G211 — Left side of the front passenger footwell.. This ground is located near the TCM. A poor connection here could directly impact the TCM's operation and trigger communication codes like U0101 alongside P0700.
• TCM Fuses — The Dart has multiple fuse boxes. A 40A fuse (F741) in the underhood power distribution center is a key power supply for the TCM. Another fuse, F15, may also be present depending on the specific transmission configuration.. A blown fuse will cut power to the TCM, causing a P0700 and likely a U0101 code. This is a simple but critical check before condemning the module.

Real Owner Repair Stories

• ScannerDanner Forum user (2013 Dodge Dart Limited 1.4L with C635 DDCT) — Check Engine Light with code P1C99 (Gear shift position sensor 1 circuit).
  ❌ Tried (didn't work) The user was trying to avoid replacing the entire valve body assembly, which Dodge quotes at over $2500.
  ✅ What actually fixed it The user identified that the integrated sensor module within the valve body was the point of failure. Instead of buying the entire assembly from Dodge, they found a company (mlreng.com) that sells the internal sensor module separately, allowing for a much cheaper repair.
• YouTube channel 'WrenchTheory501' (Dodge Dart 1.4L with DDCT) — After reinstalling the transmission, the vehicle would not move (no Drive or Reverse).
  ❌ Tried (didn't work) Simply reinstalling the transmission and clearing codes was not enough.
  ✅ What actually fixed it Performing a 'Quick Learn' procedure with an advanced scan tool was required to make the transmission function. The technician noted that it had to be performed a couple of times, followed by a test drive, and then performed again before the shifting felt correct.
• NHTSA ODI #11085068 — An owner reported a transaxle control system malfunction (P0700) occurring alongside communication errors (U1146), input speed sensor circuit issues (P0717), and transmission fluid temperature sensor low input (P0712).
• NHTSA ODI #11655418 — A report describes a vehicle that failed to restart on several occasions and was towed; the dealer retrieved codes U0100 and P0700 and attempted to flash the computer, though the failure persisted.

OEM Part Supersession History

• 68033642AB, 68192976AB, and others → 68210293AA (for 1.4L DDCT) — Revisions to address reliability issues and software updates.
  Heads up: Part number 68210293AA is the final, most updated version for the 1.4L DDCT. It replaces a long list of previous part numbers including 68033642AC, 68033642AE, 68192976AC, 68192976AE, and 68242643AA. Using an older, non-superseded part number from a junkyard may reintroduce the original failure mode. Always verify the latest part number with a dealer using the VIN.

Model Year Variations Within This Range

• 2013: The 2013 model year received significantly more complaints regarding engine, transmission, and electrical problems compared to later years. This suggests that early production models were more prone to the issues that trigger a P0700 code.
• 2013-2016: The Dart was available with three different engines (1.4L Turbo, 2.0L, 2.4L) and three different transmissions (6-speed manual, 6-speed DDCT, 6-speed conventional automatic). The P0700 code is most notoriously associated with the 1.4L Turbo engine mated to the C635 Dual Dry-Clutch Transmission (DDCT).

Documented NHTSA Reports

• NHTSA ODI #10846349: An owner reported the check engine light came on with codes P0700 and P0760 at approximately 64,000 miles, leading to a transmission overhaul including fluid and filter changes.
• NHTSA ODI #11492165: A report notes that a mechanic retrieved DTC P0700, identifying a potential transfer case motor and snap ring failure.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Excessive Oil Consumption (2.4L Tigershark) 🔴 High — Very common. A class-action lawsuit was filed. Owners report adding a quart of oil every 1,000-2,000 miles. Can lead to engine stall or failure if level gets too low. (Ref: TSB 09-003-23 (and earlier versions) outlines an oil consumption test procedure.)
• MultiAir Actuator ('Brick') Failure (1.4L & 2.4L) 🔴 High — A well-documented and expensive failure, typically occurring from 60k miles onward. Symptoms include misfires (e.g., P030x), rough running, ticking noises, and specific actuator codes (e.g., P1067).
• Faulty Thermostat 🟠 Medium — Common cause of a Check Engine Light, often with code P0128, especially in colder weather.
• Oil Seepage into Brake Booster (2.0L & 2.4L) 🔴 High — Affects 2013-2014 models. Oil from the vacuum pump can seep into the brake booster, damaging it and leading to a loss of braking assist. (Ref: NHTSA Recall 15V-432)
• Uconnect System Glitches 🟡 Low — Common complaints of the 8.4-inch touchscreen freezing, being unresponsive, or having Bluetooth connectivity issues. (Ref: Software updates were released by dealers to improve stability.)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used Transmission Control Module (TCM) from a reputable recycler can be a cost-effective option, especially if it comes from a low-mileage, later-model-year (2015-2016) donor vehicle that is less likely to have the early production flaws. However, it absolutely requires professional programming (PROXI alignment, VIN verification) to function.

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 is the latest superseded version (e.g., 68210293AA for the DDCT).
• Check for any signs of physical damage to the casing or connectors.
• Obtain the VIN of the donor car to check its history for transmission-related issues or recalls.
• Ensure the seller offers a warranty and a return policy in case the module is faulty.

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

• Transmission Control Module (TCM)
• Hydraulic Valve Body Actuator

Aftermarket brands forum-validated for this vehicle:

• For shifter cable bushings, Dorman is a widely available and accepted alternative to the OEM part.

Brands owners have reported issues with on this vehicle:

• There is little to no reliable data on aftermarket (non-remanufactured) TCMs or hydraulic actuators for this vehicle. Given the complexity and need for specific programming, sticking with OEM or a reputable OEM remanufacturer (like Mopar or MAKS) is strongly advised.

Real Owner Stories

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

Related OBD-II Codes

• U0101 — Lost Communication with TCM; often appears alongside P0700 when the TCM has failed internally or lost power/ground.
• P0613 — TCM Processor Fault; a specific internal TCM error that triggers the P0700 request for a MIL.
• P1C99 — Gear Shift Position Sensor 1 Circuit; a specific fault code stored in the TCM related to hydraulic valve body sensor failure.
• P07XX — General transmission fault codes stored in the TCM that P0700 is reporting to the engine computer.

Frequently Asked Questions