P1625 GMC Code - PCM Flash Checksum TCM Conditions
Quick Answer
The P1625 GMC code indicates a PCM (Powertrain Control Module) Flash Checksum TCM (Transmission Control Module) Conditions error. Common causes include Electrical issues, Software glitches, Faulty wiring. 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
- P1625 GMC indicates PCM Flash Checksum TCM Conditions.
- Common causes
- Common causes include Electrical issues, Software glitches, Faulty wiring.
- 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 P1625 GMC Description
The P1625 GMC code indicates a PCM (Powertrain Control Module) Flash Checksum TCM (Transmission Control Module) Conditions error. This means that there is an issue with the communication between the PCM and TCM, which are crucial components in managing the vehicle's engine and transmission functions. The PCM is responsible for controlling the engine's performance, while the TCM handles the transmission's operation. When there is a checksum error detected in the flash memory of the TCM, it means that the data stored in the module may be corrupted or incomplete, leading to communication problems between the two modules.
Common Causes of P1625 GMC
- Electrical issues
- Software glitches
- Faulty wiring
- Malfunctioning PCM or TCM
- Corrupted data in the TCM's flash memory
Symptoms of P1625 GMC
- Rough shifting
- Transmission slipping
- Hesitation during acceleration
- Reduced fuel efficiency
- Limp mode activation
How to Fix P1625 GMC
- Retrieve and analyze the error codes using a diagnostic scanner to confirm the P1625 GMC code.
- Inspect the electrical connections and wiring harness between the PCM and TCM for any damage or corrosion.
- Check and update the software in both the PCM and TCM to ensure compatibility and proper communication.
- Clear the error codes and perform a PCM/TCM relearn procedure to reset the modules and recalibrate their functions.
- Test drive the vehicle to ensure that the symptoms have been resolved and that the communication between the PCM and TCM is functioning correctly.
Cost to Fix P1625 GMC
The typical repair costs for addressing the P1625 GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it's essential to note that diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate of the repair costs.
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