P0802 Code - Transmission Control System MIL Request Circuit Open
Quick Answer
The P0802 code indicates a problem with the Transmission Control System MIL Request Circuit being open. Common causes include Faulty transmission control module (TCM), Open or short circuit in the MIL request circuit, Loose or corroded wiring connections. 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
- P0802 indicates Transmission Control System MIL Request Circuit Open.
- Common causes
- Common causes include Faulty transmission control module (TCM), Open or short circuit in the MIL request circuit, Loose or corroded wiring connections.
- 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 P0802 Description
The P0802 code indicates a problem with the Transmission Control System MIL Request Circuit being open. This means that the transmission control module (TCM) is unable to communicate with the engine control module (ECM) to turn on the malfunction indicator lamp (MIL) when necessary. The MIL is also known as the check engine light. This communication issue can lead to a variety of problems with the transmission system, potentially causing drivability issues and affecting the overall performance of the vehicle. If left unresolved, it could result in further damage to the transmission components and other related systems.
Common Causes of P0802
- Faulty transmission control module (TCM)
- Open or short circuit in the MIL request circuit
- Loose or corroded wiring connections
- Faulty ECM
- Software or programming issues
Symptoms of P0802
- Check engine light is not illuminated when there is a transmission issue
- Transmission shifting erratically or slipping
- Harsh shifting or delayed engagement
- Reduced fuel efficiency
- Vehicle may go into "limp mode" to protect the transmission
How to Fix P0802
- Use a scan tool to diagnose the specific cause of the P0802 code
- Inspect and repair any damaged wiring or connectors in the MIL request circuit
- Test the TCM and ECM for proper functionality and replace if necessary
- Clear the code and test drive the vehicle to ensure the issue has been resolved
- Perform a transmission relearn procedure if needed to reset adaptations and improve shifting performance
Cost to Fix P0802
The cost of repairing a P0802 code can vary depending on the underlying cause and the labor rates at the auto repair shop. In general, the cost of parts for this repair could range from $100 to $500, with labor costs adding another $100 to $300. Total repair costs could therefore be in the range of $200 to $800. It is important to note that actual costs may be higher in certain locations or for specific vehicle makes and models. It is recommended to obtain a detailed estimate from a qualified mechanic before proceeding with the repair.
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Code P0802 Information for Specific Makes
- P0802 Chevrolet — Transmission Control System MIL Request Circuit Open
- P0802 GMC — Transmission Control System MIL Request Circuit Open
- P0802 Isuzu — Transmission Control Module MIL Request Circuit
Frequently Asked Questions about P0802 Code
No Frequently Asked Questions about P0802 Code found.
Discuss the causes and fixes for P0802 OBDII Code
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i have this code p0802 trans control module. how do i fix it. my truck will not turn on
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