P1685 Chevrolet Code - Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage
Quick Answer
The P1685 code for Chevrolet vehicles indicates a problem with the Transmission Control Module (TCM) Power Up Temperature Sensor Circuit, specifically indicating low voltage. Common causes include Faulty temperature sensor in the transmission, Wiring or connection issues in the TCM power up temperature sensor circuit, Corrosion or damage to the electrical connectors related to the circuit. 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
- P1685 Chevrolet indicates Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty temperature sensor in the transmission, Wiring or connection issues in the TCM power up temperature sensor circuit, Corrosion or damage to the electrical connectors related to the circuit.
- 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 P1685 Chevrolet Description
The P1685 code for Chevrolet vehicles indicates a problem with the Transmission Control Module (TCM) Power Up Temperature Sensor Circuit, specifically indicating low voltage. The TCM is responsible for controlling and coordinating the operation of the transmission in the vehicle. The power up temperature sensor is a component that monitors the temperature of the transmission fluid and provides feedback to the TCM. When the voltage in this circuit is detected to be low, it can lead to issues with the transmission's performance and overall drivability of the vehicle.
Common Causes of P1685 Chevrolet
- Faulty temperature sensor in the transmission
- Wiring or connection issues in the TCM power up temperature sensor circuit
- Corrosion or damage to the electrical connectors related to the circuit
- Issues with the TCM or other related components affecting the circuit
- Electrical system malfunctions or a failing battery affecting voltage levels
Symptoms of P1685 Chevrolet
- Harsh shifting or jerking movements when changing gears
- Transmission slipping or difficulty shifting gears
- Delayed engagement when shifting from park to drive or reverse
- Illumination of the check engine light on the dashboard
- Reduced fuel efficiency or overall performance of the vehicle
How to Fix P1685 Chevrolet
- Diagnose the specific cause of the low voltage in the temperature sensor circuit using a diagnostic scanner
- Inspect the temperature sensor, wiring, and connectors for any damage or corrosion
- Repair or replace the faulty temperature sensor or damaged wiring/connectors as needed
- Clear the diagnostic trouble codes and reset the TCM to ensure proper operation
- Test drive the vehicle to confirm that the issue has been resolved and that the transmission is functioning correctly
Cost to Fix P1685 Chevrolet
The cost of repairing a P1685 code on a Chevrolet vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost can range from $150 to $500 for parts and labor. However, it's important to note that labor rates and parts costs can vary based on the location of the repair shop, the vehicle's make and model, and the severity of the issue. It's recommended to get a detailed estimate from a trusted auto repair shop to determine the exact cost for addressing this code.
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