What does this code mean?
Measured air flow does not agree with the expected operating range or the controller's plausibility model. This is a performance code, not the same as a circuit-low or circuit-high code. It does not prove the MAF sensor needs replacement: the cited Nissan bulletin includes a software-related scenario without drivability symptoms.
Sources and interpretation [1]
A code identifies a detected condition, not a part that must automatically be replaced.
Before replacing a part
Save the operating conditions and other codes. Review the correct MAF plausibility test before condemning the sensor. For the Nissan example, match the exact vehicle, engine and current ECM part number against the bulletin's tables before considering reprogramming.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0101MASS AIRFLOW SENSOR PERFORMANCE SET WITH 6.6L DURAMAX DIESEL ENGINE (VIN 6 - RPO LMM)Manufacturer communications
9Original wording in English
CHEVROLET, GMC
Reported code forms P0101
This Preliminary Information communication provides information to the technician about vehicles with Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0101. Technician should…
CHEVROLET, GMC
Reported code forms P0101
This Preliminary Information communication provides information to the technician about vehicles with Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0101. Technician should…
CHEVROLET, GMC
Reported code forms P0101
This Preliminary Information communication provides information to the technician about vehicles with Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0101. Technician should…
CHEVROLET, GMC
Reported code forms P0101
GMC/CHEVROLET: LOSS OF POWER SNOW OR ICE IN AIR INTAKE. A DEALER MAY ENCOUNTER VEHICLE WITH LOSS OF POWER DUE TO SNOW OF ICE IN AIR INTAKE. VEHICLE MAY OR MAY NOT HAVE DTC P0101. *PE
CHEVROLET, GMC
Reported code forms P0101
CHEVROLET/GMC: WIRE HARNESS CHAFES NEAR AIR CLEANER AND DUCTWORK. MAY ENCOUNTER A CONCERN OF REDUCED POWER MODE OR THE SES LIGHT ON WITH DTCS P0101, P0106, P0107, P0108, P0299, P0652 SETTING. *PE
CHEVROLET, GMC
Reported code forms P0101
CHEVROLET/GMC: DIAGNOSTIC AND REPAIR INFORMATION ON POOR ENGINE PERFORMANCE WITH DTC P0101-MASS AIR FLOW SENSOR PERFORMANCE SET. *PE
Check vehicle applicability
8A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Sources and interpretation
These explanations are editorial summaries of the linked manufacturer material. PDF page numbers count from the first file page. Original publications are in English; translations are reference aids. A cited edition is not a claim that it is the manufacturer's latest instruction.
- Audi TT Quick Reference Specification Book · October 2013 ↗
Audi of America · PDF page(s) 130 ·
- NTB12-051k · Nissan; MIL ON with DTC P0101 ↗
Nissan North America · PDF page(s) 1, 4, 5, 6, 7 ·
Source check date · 2026-10-27
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.