AutoCodes – GMC – P2545 GMC

P2545 GMC Code - Torque Management Request Input Signal 'A' Range/Performance

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: P2545 GMC indicates Torque Management Request Input Signal 'A' Range/Performance.
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.

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Code Popularity 1,569

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 Jan 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2545 GMC Description

To improve shift feel, the Transmission Control Module (TCM) may request that the Engine Control Module (ECM) reduce engine torque during shift events. When such a request is received, the ECM responds by retarding the base ignition timing and notifying the TCM that the request has succeeded. If the ECM is unable to comply with the request, the ECM sends the TCM a message that the request has failed.
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.

OBDII Code P2545 GMC - Torque Management Request Input Signal 'A' Range/Performance - AutoCodes.com — P2545 GMC Code - Torque Management Request Input Signal 'A' Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2545 GMC?

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 P2545 GMC?

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 P2545 GMC 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 P2545 GMC Code

1. What are the common symptoms of OBDII code P2545 in a GMC vehicle?

- Common symptoms include reduced engine power, illuminated Check Engine Light (CEL), and potential transmission shifting issues.

2. What could cause the Torque Management Request Input Signal 'A' Range/Performance error code in a GMC?

- Possible causes include a faulty torque management sensor, damaged wiring or connectors, or issues with the powertrain control module.

3. How can I diagnose the P2545 code in my GMC?

- Diagnosis typically involves using a scan tool to retrieve the trouble code, checking the sensor and related wiring for any damage, and testing the sensor's signal.

4. Can a DIYer repair the Torque Management Request Input Signal 'A' error code?

- DIY repairs are possible depending on the individual's skill level. Basic repairs may include replacing the faulty sensor or repairing damaged wiring.

5. What are the potential long-term effects of ignoring the P2545 code in a GMC?

- Ignoring this code can lead to reduced engine performance, potential transmission issues, and increased fuel consumption over time.

6. Is it safe to continue driving with the P2545 error code present?

- It is not recommended to drive with the P2545 code active, as it can affect the vehicle's performance and may lead to further damage if left unaddressed.

7. How much does it typically cost to repair the Torque Management Request Input Signal 'A' Range/Performance code?

- Repair costs can vary depending on the specific issue, but they may range from $100 to $500, including parts and labor.

8. Can resetting the Check Engine Light resolve the P2545 code temporarily?

- Resetting the CEL may temporarily clear the code, but it will likely return if the underlying issue causing the code is not addressed.

9. Are there any preventive measures to avoid triggering the P2545 code in a GMC?

- Regular maintenance, such as checking and replacing sensors as needed, can help prevent issues that may lead to the P2545 code.

10. Can a dealership or mechanic provide further insight into the Torque Management Request Input Signal 'A' error code?

- Yes, a dealership or qualified mechanic can perform a more in-depth diagnosis to pinpoint the exact cause of the P2545 code and recommend a proper repair solution.