P0685 Pontiac Code - Engine Control Module Power Relay Control Circuit Open
Quick Answer
The powertrain relay is a normally open relay. Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) power relay. 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
- P0685 Pontiac indicates Engine Control Module Power Relay Control Circuit Open.
- Common causes
- Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) power relay.
- 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 P0685 Pontiac Description
What are the Possible Causes of the DTC P0685 Pontiac?
- Weak battery
- Low voltage while cranking
- Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Blown ECM fuse
- Faulty ECM
How to Fix the DTC P0685 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0685 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.
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Frequently Asked Questions about P0685 Pontiac Code
1. What are the common symptoms of OBDII code P0685 in a Pontiac related to the Engine Control Module Power Relay Control Circuit Open?
The common symptoms include engine stalling, difficulty starting the vehicle, and illuminated Check Engine Light.
2. What are the possible causes of OBDII code P0685 indicating an Engine Control Module Power Relay Control Circuit Open in a Pontiac?
Possible causes include a faulty power relay, damaged wiring or connectors in the relay circuit, or a malfunctioning Engine Control Module.
3. How can I diagnose the cause of OBDII code P0685 in my Pontiac?
You can start by checking the power relay and its connections, testing the relay circuit for continuity, and inspecting the wiring harness for any signs of damage.
4. What are some tips for repairing OBDII code P0685 in a Pontiac?
Repair tips include replacing the faulty power relay, repairing any damaged wiring or connectors, or replacing the Engine Control Module if necessary.
5. Can I drive my Pontiac with OBDII code P0685 present?
It is not recommended to drive the vehicle with this code present as it can lead to potential issues with starting the engine and overall performance.
6. How much does it typically cost to repair OBDII code P0685 in a Pontiac?
The cost of repairs can vary depending on the underlying cause, but it may range from around $100 to $500, including parts and labor.
7. Will resetting the Check Engine Light make OBDII code P0685 go away in a Pontiac?
Resetting the Check Engine Light may temporarily turn it off, but if the underlying issue causing the code is not addressed, it is likely to reappear.
8. Can a DIY enthusiast fix OBDII code P0685 in a Pontiac?
If you have experience with automotive repairs and diagnostics, you may be able to fix this issue yourself by following repair guides and using the right tools.
9. Is OBDII code P0685 a serious problem in a Pontiac?
While it may not pose an immediate danger, ignoring this code can lead to more severe issues with the engine's performance and overall reliability.
10. How long does it take to repair OBDII code P0685 in a Pontiac?
The repair time can vary depending on the specific cause of the code, but it typically takes a few hours to diagnose and fix the issue.
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