AutoCodes – RAM – C2502 RAM

C2502 RAM Code - DTCM Signal Plausibility Failure

Quick Answer

Any time the key is on and the engine has been running for at least 4 seconds the Drivetrain Control Module (DTCM) continuously runs a diagnostic check on the Transmission Control Module (TCM), Anti-lock Brake System (ABS) Module, Electric Power Steering (EPS) Module and the Powertrain Control Module (PCM) to ensure that the Modules can honor any Terrain Selector Switch request. Common causes include Faulty Anti-Lock Brake System (ABS) Module, Faulty Electric Power Steering (EPS) Module, Faulty Powertrain Control Module (PCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C2502 RAM indicates DTCM Signal Plausibility Failure.
Common causes: Common causes include Faulty Anti-Lock Brake System (ABS) Module, Faulty Electric Power Steering (EPS) Module, Faulty Powertrain Control Module (PCM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 933

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2502 RAM Description

Any time the key is on and the engine has been running for at least 4 seconds the Drivetrain Control Module (DTCM) continuously runs a diagnostic check on the Transmission Control Module (TCM), Anti-lock Brake System (ABS) Module, Electric Power Steering (EPS) Module and the Powertrain Control Module (PCM) to ensure that the Modules can honor any Terrain Selector Switch request. If the DTCM receives a message from one of these other modules indicating that they have had a failure, the DTCM forces the terrain selector switch into AUTO mode and will disable the terrain selection option to the customer. This DTC is set in the DTCM to inform the Technician that the AWD system is working properly but the driving mode can not be selected because another system in the vehicle has failed.

OBDII Code C2502 RAM - DTCM Signal Plausibility Failure - AutoCodes.com — C2502 RAM Code - DTCM Signal Plausibility Failure

What does this mean?

What are the Possible Causes of the DTC C2502 RAM?

Faulty Anti-Lock Brake System (ABS) Module
Faulty Electric Power Steering (EPS) Module
Faulty Powertrain Control Module (PCM)
Faulty Transmission Control Module (TCM)

How to Fix the DTC C2502 RAM?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C2502 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C2502 RAM Code

1. What are the common symptoms of OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- Common symptoms include erratic shifting, transmission slipping, and illuminated warning lights on the dashboard.

2. What causes the OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- This code is typically triggered by issues with the transmission control module (TCM), wiring faults, or communication errors between modules.

3. How can I diagnose the OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- Diagnosis involves using a scan tool to retrieve the fault codes, checking the TCM for any visible damage, and inspecting the wiring for any signs of wear or corrosion.

4. What are the possible repair options for OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- Repair options may include repairing or replacing damaged wiring, resetting the TCM, updating software, or replacing the TCM if necessary.

5. Can I drive my vehicle with the OBDII code C2502 RAM (DTCM Signal Plausibility Failure) active?

- It is not recommended to drive with this code active, as it can lead to further damage to the transmission and other components.

6. How much does it cost to repair the OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- The cost of repairs can vary depending on the extent of the issue, but it is advisable to consult a professional mechanic for an accurate estimate.

7. Are there any preventive measures to avoid OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- Regular maintenance of the transmission system, including checking for leaks and ensuring proper fluid levels, can help prevent issues that may trigger this code.

8. Can a DIY enthusiast fix the OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- While some basic checks and maintenance tasks can be done by DIY enthusiasts, diagnosing and repairing complex transmission issues may require professional expertise.

9. How long does it take to repair the OBDII code C2502 RAM (DTCM Signal Plausibility Failure)?

- The repair time can vary depending on the specific cause of the issue, availability of parts, and the skill level of the mechanic performing the repairs.

10. Is the OBDII code C2502 RAM (DTCM Signal Plausibility Failure) a common issue in certain vehicle models?

- This code may be more common in certain vehicle models that are known to have transmission control module or wiring issues, so it's advisable to check for any manufacturer recalls or service bulletins related to this problem.