P1686 Pontiac Code - Transmission Control Module Power Up Temperature Sensor Circuit High Voltage
Quick Answer
The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly and has no serviceable parts. Common causes include Reprogram TCM and recheck code, Replace Transmission Control Module (TCM) Sensor/body assembly one piece. 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
- P1686 Pontiac indicates Transmission Control Module Power Up Temperature Sensor Circuit High Voltage.
- Common causes
- Common causes include Reprogram TCM and recheck code, Replace Transmission Control Module (TCM) Sensor/body assembly one piece.
- 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 P1686 Pontiac Description
What are the Possible Causes of the DTC P1686 Pontiac?
- Reprogram TCM and recheck code
- Replace Transmission Control Module (TCM) Sensor/body assembly one piece
How to Fix the DTC P1686 Pontiac?
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 P1686 Pontiac 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.
Need more information about the P1686 Pontiac code?
Need more information on how to fix the P1686 Pontiac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1686 Pontiac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1686 Pontiac Code
1. What does the OBDII code P1686 mean on a Pontiac?
P1686 indicates an issue with the Transmission Control Module (TCM) Power Up Temperature Sensor Circuit, specifically detecting a high voltage condition.
2. What are the common symptoms of a P1686 code in a Pontiac?
Symptoms may include transmission shifting issues, erratic gear changes, the transmission going into limp mode, or the check engine light being illuminated.
3. What causes the P1686 code to appear?
Common causes include a faulty temperature sensor, damaged or corroded wiring, a malfunctioning Transmission Control Module (TCM), or electrical issues such as a short circuit.
4. Can a bad TCM cause the P1686 code?
Yes, a malfunctioning TCM can cause the P1686 code if it fails to properly process signals from the temperature sensor.
5. How do I diagnose the P1686 code?
Diagnose the code by checking the wiring and connectors for damage, testing the temperature sensor for proper operation, and using a scan tool to monitor voltage readings.
6. Is it safe to drive with a P1686 code?
Driving with a P1686 code may cause further damage to the transmission or other components, so it’s recommended to address the issue promptly.
7. How is the P1686 code fixed?
Repairs include replacing the faulty temperature sensor, repairing or replacing damaged wiring, or reprogramming or replacing the TCM if necessary.
8. Can a software update fix the P1686 code?
In some cases, a software update for the TCM may resolve the issue if it’s caused by a programming error rather than a hardware fault.
9. How much does it cost to repair a P1686 code?
Repair costs vary, but replacing a temperature sensor may cost $100-$300, while TCM replacement or reprogramming can range from $500-$1,200.
10. Can a loose connector trigger the P1686 code?
Yes, a loose or corroded connector can disrupt the sensor’s voltage signal, leading to the P1686 code being triggered.
Discuss the causes and fixes for P1686 Pontiac OBDII Code
Code P1686 Pontiac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
