P0802 GMC Code - Transmission Control System MIL Request Circuit Open
Quick Answer
The Transmission Control Module (TCM) Malfunction Indicator Lamp (MIL) request circuit signals the Powertrain Control Module (PCM) that the TCM is requesting MIL illumination. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection. 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 GMC indicates Transmission Control System MIL Request Circuit Open.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection.
- 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 P0802 GMC Description
What are the Possible Causes of the DTC P0802 GMC?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module (TCM) harness is open or shorted
- Transmission Control Module (TCM) circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P0802 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 P0802 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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Frequently Asked Questions about P0802 GMC Code
1. What are the common symptoms of OBDII code P0802 GMC?
The common symptoms of code P0802 GMC include the Check Engine Light (MIL) being illuminated on the dashboard and potential issues with the transmission control system.
2. What can cause the OBDII code P0802 GMC to appear?
The P0802 code typically appears due to a malfunction in the transmission control system MIL request circuit being open. This can be caused by wiring issues, a faulty transmission control module, or a poor electrical connection.
3. How serious is the OBDII code P0802 GMC?
While the P0802 code may not cause immediate drivability issues, it is important to address it promptly to prevent potential transmission problems in the future. Ignoring the code could lead to more severe issues over time.
4. How can I diagnose the OBDII code P0802 GMC?
Diagnosing the P0802 code involves using a professional OBDII scanner to retrieve the code and then inspecting the transmission control system components, wiring, and connectors for any visible issues. It may also require testing the circuit for proper voltage and continuity.
5. Can I still drive my vehicle with the OBDII code P0802 GMC present?
In most cases, it is safe to drive your vehicle with the P0802 code present, especially if you are not experiencing any noticeable transmission problems. However, it is recommended to have the issue diagnosed and repaired as soon as possible.
6. What are some repair tips for fixing the OBDII code P0802 GMC?
Repairing the P0802 code may involve checking and repairing any damaged wiring or connectors in the transmission control system circuit. It may also require replacing a faulty transmission control module if necessary.
7. How much does it typically cost to repair the OBDII code P0802 GMC?
The cost of repairing the P0802 code can vary depending on the extent of the issue and the specific components that need to be replaced. It is recommended to consult with a professional mechanic for an accurate diagnosis and cost estimate.
8. Can a DIY enthusiast fix the OBDII code P0802 GMC at home?
While some DIY enthusiasts may be able to diagnose and repair the P0802 code themselves, it is recommended to have a professional mechanic handle the repair to ensure it is done correctly and to prevent any further issues down the line.
9. Will resetting the OBDII code P0802 GMC make it go away permanently?
Resetting the P0802 code may temporarily turn off the Check Engine Light, but if the underlying issue is not addressed and repaired, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem to prevent it from coming back.
10. How long does it take to repair the OBDII code P0802 GMC?
The repair time for the P0802 code can vary depending on the complexity of the issue and the availability of parts. In some cases, it may be a quick fix, while in others, it could take several hours or even days to fully diagnose and repair the problem.
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