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 communications
5Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0101
This Preliminary information communicates additional diagnostics and repair to assist in resolving a malfunction indicator lamp illumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171…
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0101
This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131…
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0101
This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131…
CHEVROLET
Reported code forms P0101
CHEVROLET: ENGINE POWER IS REDUCED MESSAGE AND CHECK ENGINE LAMP ON WITH DTC P0841. THE CONCERN MAY BE INTERMITTENT. OTHER DTCS THAT MAY SET ARE P0532, P0522, P0452, P0335, P0106, P0101 AND P0068. THREE AREAS WHERE WIRE…
BUICK, CADILLAC, CHEVROLET
Reported code forms P0101
WATER IN AIR PUMP AND/OR DTC P0410, P0412, P1415, P1416, P0100, P0101, P0102 AND DTC 48 (INSTALL AIR PUMP SERVICE KIT). *TW
Check vehicle applicability
12A 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.