Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the temperature sensor in the engine area is reading a temperature that's too low to be real.
The engine control module (ECM) detects that the temperature reading from the cold start engine compartment temperature sensor is lower than expected.
The P11F8 code is triggered when the ECM receives a signal from the cold start engine compartment temperature sensor that indicates an implausibly low temperature. This sensor helps the ECM adjust fuel and air mixture for optimal cold start performance. An implausible low reading could indicate a sensor malfunction or a wiring issue.
• Check Engine Light illuminated
• Poor cold start performance
• Increased fuel consumption
• Faulty temperature sensor
• Wiring issues or poor connections
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the temperature sensor and its wiring for damage.
• Test the sensor's resistance and compare it to specifications.
• Replace the faulty temperature sensor.
• Repair or replace damaged wiring.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect sensors and wiring.
• Ensure proper maintenance of the vehicle's electrical system.
• Use a diagnostic tool periodically to check for pending codes.
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving in extreme conditions until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on sensors.
This code is relatively uncommon and usually associated with sensor or wiring issues.
Moderate – It should be addressed soon to prevent poor engine performance.
Driving with a faulty temperature sensor can lead to increased emissions and may not comply with local regulations.
• Engine cold start
• Ambient temperature readings
The cold start engine compartment temperature sensor is typically located in the engine bay, near the air intake or cooling system.
Q: Can I drive with a P11F8 code?
A: It's possible, but not recommended as it can lead to poor engine performance and increased fuel consumption.
Q: How do I reset the P11F8 code?
A: After fixing the issue, you can reset the code using an OBD-II scanner.
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