P0690 Code - Electronic Control Module Power Relay Sense Circuit High
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
- P0690 indicates Electronic Control Module Power Relay Sense Circuit High.
- 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 P0690 Description
What are the Possible Causes of the DTC P0690?
- 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 P0690?
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 P0690 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 P0690 code?
Need more information on how to fix the P0690 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0690 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0690 Buick — Electronic Control Module Power Relay Sense Circuit High
- P0690 Cadillac — Electronic Control Module Power Relay Sense Circuit High
- P0690 Chevrolet — Electronic Control Module Power Relay Sense Circuit High
- P0690 Chrysler — Auto Shutdown Relay Control Circuit High
- P0690 Dodge — Auto Shutdown Relay Control Circuit High
- P0690 Ford — Electronic Control Module Power Relay Sense Circuit High
- P0690 GMC — Electronic Control Module Power Relay Sense Circuit High
- P0690 Isuzu — Engine Controls Ignition Relay Feedback Circuit High Voltage
- P0690 Jeep — Auto Shutdown Relay Control Circuit High
- P0690 Lincoln — Electronic Control Module Power Relay Sense Circuit High
- P0690 Mazda — Electronic Control Module Power Relay Sense Circuit High
- P0690 Mercury — Electronic Control Module Power Relay Sense Circuit High
- P0690 Mitsubishi — Electronic Control Module Power Relay Sense Circuit High
- P0690 Pontiac — Electronic Control Module Power Relay Sense Circuit High
- P0690 Saturn — Electronic Control Module Power Relay Sense Circuit High
- P0690 Suzuki — Engine Controls Ignition Relay Feedback Circuit High Voltage
Frequently Asked Questions about P0690 Code
1. What are the common symptoms of OBDII code P0690 (Electronic Control Module Power Relay Sense Circuit High)?
- Common symptoms include engine stalling, rough idling, poor acceleration, and illuminated Check Engine light.
2. What are the possible causes of OBDII code P0690?
- The code P0690 can be caused by a faulty electronic control module power relay, damaged wiring or connectors in the relay circuit, or a malfunctioning electronic control module itself.
3. How can I diagnose the cause of OBDII code P0690?
- To diagnose the cause of P0690, you can perform a visual inspection of the relay and its wiring, check the relay operation, test the voltage at the relay circuit, and use a scan tool to monitor the electronic control module.
4. What are some repair tips for resolving OBDII code P0690?
- Repair tips include replacing a faulty power relay, repairing damaged wiring or connectors, and, if necessary, replacing the electronic control module. Ensure all repairs are done accurately to prevent future issues.
5. Can I drive my vehicle with OBDII code P0690 present?
- It is not recommended to drive your vehicle with code P0690 present, as it can lead to potential engine performance issues and further damage if left unresolved. It is best to address the issue promptly.
6. How much does it typically cost to repair OBDII code P0690?
- The cost of repairing code P0690 can vary depending on the underlying cause. Costs may include parts such as a relay or electronic control module, labor for diagnosis and repair, and any additional components needed.
7. Is it possible to reset OBDII code P0690 without repairing the issue?
- While you can clear the code with an OBDII scanner, it is not recommended to reset the code without addressing the underlying problem. Resetting the code without repairs may lead to recurring issues and potential safety hazards.
8. Can a DIY enthusiast repair OBDII code P0690 at home?
- Repairing code P0690 may be challenging for DIY enthusiasts due to the complexity of electronic control systems. It is recommended to have the necessary tools, knowledge, and experience or seek professional help to ensure proper diagnosis and repair.
9. How long does it take to repair OBDII code P0690?
- The time to repair code P0690 can vary based on the cause of the issue, the availability of parts, and the expertise of the technician. It may take anywhere from a few hours to a full day to diagnose and repair the problem.
10. Can OBDII code P0690 cause permanent damage to the vehicle if left untreated?
- Ignoring code P0690 can potentially lead to permanent damage to the electronic control module, affecting the overall performance and drivability of the vehicle. It is essential to address the issue promptly to prevent further damage.
Discuss the causes and fixes for P0690 OBDII Code
-
I ran into this problem with the code P0690 and check the relay for power output on pin 30 with key on and off and it was good. So I check the PCM for power it had power with key on and off. I found out that some one had cut the wire and connected to a power wire so I cut that wire and ran it back to the pin 30 of the relay and my problem was solved. So always check power at the PCM pin73 with key on and off before replacing any parts.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
