P1684 GMC Code - Transmission Control Module Power Up Temperature Sensor Performance
Quick Answer
The P1684 diagnostic trouble code (DTC) for GMC vehicles relates to the Transmission Control Module (TCM) Power Up Temperature Sensor Performance. Common causes include Faulty power-up temperature sensor, Wiring or connection issues, TCM software malfunction. 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
- P1684 GMC indicates Transmission Control Module Power Up Temperature Sensor Performance.
- Common causes
- Common causes include Faulty power-up temperature sensor, Wiring or connection issues, TCM software malfunction.
- 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 P1684 GMC Description
The P1684 diagnostic trouble code (DTC) for GMC vehicles relates to the Transmission Control Module (TCM) Power Up Temperature Sensor Performance. This code indicates that there is an issue with the power-up temperature sensor within the TCM that is affecting its performance. The TCM is an essential component in the vehicle's transmission system, responsible for controlling and managing gear shifts, torque converter lockup, and other functions to ensure smooth operation.
Common Causes of P1684 GMC
- Faulty power-up temperature sensor
- Wiring or connection issues
- TCM software malfunction
- Transmission fluid level or quality issues
- Electrical system problems
Symptoms of P1684 GMC
- Erratic shifting patterns
- Delayed or harsh shifts
- Transmission slipping
- Limp mode activation
How to Fix P1684 GMC
- Diagnose the issue using a scan tool to confirm the P1684 code and pinpoint the exact cause.
- Inspect the power-up temperature sensor and its wiring for any damage or corrosion.
- Test the sensor's resistance and compare it to specifications to determine if it is faulty.
- Replace the power-up temperature sensor if it is found to be defective.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1684 GMC
The typical repair costs for addressing the P1684 code can vary depending on the specific cause of the issue. In general, replacing the power-up temperature sensor and addressing any wiring or connection problems can range from $150 to $300 in parts and labor. However, it's important to note that diagnostic time and labor rates can vary between auto repair shops, with rates typically ranging from $80 to $150 per hour. It's advisable to consult with a professional technician to get a more accurate estimate based on your vehicle's make and model.
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