P1128
MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted
P1128 is an OBD-II diagnostic trouble code meaning: MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted. Common causes: maf sensor malfunction, contamination of the sensor element of the air flow sensor. Estimated repair cost: $28–89.
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
Related codes
Error P1128 by Vehicle Brand
FAQ
What does the P1128 code mean?
P1128 is an OBD-II diagnostic trouble code that indicates: MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted
What causes a P1128 error code?
The most common causes of P1128 include: 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.
How do I fix a P1128 diagnostic trouble code?
To fix P1128: 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.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1128?
Yes, but get it checked soon
How much does it cost to fix P1128?
The estimated repair cost for P1128 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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