P2551 Pontiac Code - Torque Management Request Input Signal 'B' High
Quick Answer
To improve shift feel, the Transmission Control Module (TCM) may request that the Engine Control Module (ECM) reduce engine torque during shift events. Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), Engine Control Module (ECM) software update. 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
- P2551 Pontiac indicates Torque Management Request Input Signal 'B' High.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), Engine Control Module (ECM) software update.
- 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.
Code P2551 Pontiac Description
The torque reduction request is sent to the ECM through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM.
A fault in the CAN will not cause the ECM to set the Diagnostic Trouble Codes (DTC). If a CAN fault occurs, other DTCs will set before this code.
The ECM set the OBDII code when the TCM receives a torque reduction failure message from the ECM.
What are the Possible Causes of the DTC P2551 Pontiac?
- Faulty Engine Control Module (ECM)
- Faulty Transmission Control Module (TCM)
- Engine Control Module (ECM) software update
- Transmission Control Module (TCM) software update
- Engine Control Module (ECM) harness is open or shorted
- Engine Control Module (ECM) circuit poor electrical connection
How to Fix the DTC P2551 Pontiac?
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 P2551 Pontiac 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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Frequently Asked Questions about P2551 Pontiac Code
1. What are the common symptoms of OBDII code P2551 in a Pontiac related to Torque Management Request Input Signal 'B' High?
- Common symptoms include reduced engine performance, engine stalling, and illuminated Check Engine Light.
2. What could be the possible causes of OBDII code P2551 in a Pontiac?
- The code P2551 in a Pontiac may be triggered by a faulty torque management input sensor, damaged wiring or connectors, or issues with the powertrain control module.
3. How can I diagnose the OBDII code P2551 in my Pontiac?
- To diagnose OBDII code P2551, you can use a diagnostic scanner to read the code and perform a thorough inspection of the torque management input sensor, wiring, and connectors for any signs of damage or malfunction.
4. What are the repair tips for addressing OBDII code P2551 in a Pontiac?
- Repair tips for OBDII code P2551 may include replacing the torque management input sensor, repairing or replacing damaged wiring or connectors, and resetting the fault code using a diagnostic scanner.
5. Can I continue driving my Pontiac with OBDII code P2551 present?
- It is not recommended to continue driving your Pontiac with OBDII code P2551 present, as it can lead to further damage to the engine and other components. It is advisable to address the issue promptly.
6. How much does it typically cost to repair OBDII code P2551 in a Pontiac?
- The cost of repairing OBDII code P2551 in a Pontiac can vary depending on the specific cause of the issue, but it may range from $100 to $300, including parts and labor.
7. Is it possible to reset OBDII code P2551 in a Pontiac without addressing the underlying issue?
- While it is possible to reset OBDII code P2551 using a diagnostic scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
8. Are there any preventive measures to avoid OBDII code P2551 in a Pontiac?
- To prevent OBDII code P2551 in a Pontiac, it is advisable to perform regular maintenance checks, including inspecting the torque management input sensor and related components for any signs of wear or damage.
9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P2551 in a Pontiac?
- Depending on the specific cause of OBDII code P2551, a DIY enthusiast with basic automotive knowledge may be able to address the issue by replacing the torque management input sensor or repairing damaged wiring.
10. How long does it take to repair OBDII code P2551 in a Pontiac?
- The time it takes to repair OBDII code P2551 in a Pontiac can vary based on the extent of the issue and the availability of parts, but it typically takes 1-2 hours for a professional technician to diagnose and fix the problem.
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