P1685 Saturn Code - Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage
Quick Answer
The P1685 code for Saturn vehicles indicates a problem with the Transmission Control Module (TCM) Power Up Temperature Sensor Circuit, specifically detecting low voltage. Common causes include Faulty power-up temperature sensor, Wiring or connector issues in the temperature sensor circuit, Low transmission fluid level or contaminated fluid. 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 Saturn indicates Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty power-up temperature sensor, Wiring or connector issues in the temperature sensor circuit, Low transmission fluid level or contaminated fluid.
- 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 Saturn Description
The P1685 code for Saturn vehicles indicates a problem with the Transmission Control Module (TCM) Power Up Temperature Sensor Circuit, specifically detecting low voltage. The TCM plays a crucial role in controlling the transmission system, including gear shifting, torque converter lockup, and overall transmission performance. The power-up temperature sensor is responsible for monitoring the temperature of the transmission fluid and ensuring that it is within the optimal range for operation.
Common Causes of P1685 Saturn
- Faulty power-up temperature sensor
- Wiring or connector issues in the temperature sensor circuit
- Low transmission fluid level or contaminated fluid
- Malfunctioning TCM
- Electrical issues in the transmission control system
Symptoms of P1685 Saturn
- Erratic shifting behavior
- Slipping gears
- Delayed engagement
- Reduced fuel efficiency
- Illumination of the Check Engine Light
How to Fix P1685 Saturn
- Begin by diagnosing the specific cause of the low voltage in the power-up temperature sensor circuit using a diagnostic scanner.
- Inspect the power-up temperature sensor, wiring, and connectors for any signs of damage or corrosion. Replace any faulty components.
- Check the transmission fluid level and condition, topping up or performing a fluid flush if necessary.
- Test the TCM for proper functionality and replace it if found to be faulty.
- Clear the diagnostic trouble codes, reset the TCM, and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1685 Saturn
The cost of repairing the P1685 code on a Saturn vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts and labor for this repair could range from $200 to $500. However, it is essential to note that prices can fluctuate based on factors such as the location of the repair shop, the vehicle's make and model, and the type of engine. Additionally, diagnostic time and labor rates at auto repair shops can typically range from $80 to $150 per hour, with rates potentially being higher in metropolitan areas or at dealerships and lower at independent shops. To obtain a more accurate estimate, it is recommended to inquire with local repair shops.
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