P1128
MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Rough engine idling
- Increased fuel consumption
- Loss of engine power
- Stalls at idle
- Check Engine light comes on
Causes
- MAF sensor malfunction
- Contamination of the sensor element of the air flow sensor
- Problems with the sensor electrical circuit
- Air leaks after mass air flow sensor
- Problems with the sensor connector
How to Fix
- Check the condition and cleanliness of the air flow sensor
- Check the electrical circuit of the sensor for opens and short circuits
- Check the MAF connector for oxidation and damage.
- Check the system for air leaks
- If necessary, replace the mass air flow sensor