P0100: Mass or volume air flow circuit
What the code tells you on its own
- System
- Powertrain
- Functional group
- Air intake and MAF/MAP
- Subsystem
- Fuel and air metering
Engine, fuel, air, ignition, emissions and transmission. The overwhelming majority of what workshops bring to the AI.
What we see when P0100 turns up
Measured across the diagnostics run through Wrenchlane, not taken from a reference table. Figures as of 2026-10-06.
- Diagnostics
- 12
- Separate workshops
- 11
- Arrived code only
- 58%
- Most common marque
- Ford
March 2026 to September 2026
Not one shop meeting it repeatedly
No symptom description entered at all
Where we have seen it most
These are counts from our own work, not a claim about how common the fault is across all vehicles. They describe what independent workshops brought to us, which is a narrower and more specific thing.
What P0100 usually turns up with
Measured across our own diagnostics. The multiplier is how much more often the two appear together than chance would predict, so a high number means the pair is telling you something a single code is not. Codes rarely arrive alone, and reading the set is usually faster than chasing the first one on the list.
| Code | What it is | Seen together | Versus chance |
|---|---|---|---|
| P2279 | Intake air system leak | 3 times | 43.7x |
Run P0100 against the car in front of you
Enter the code and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
Start freeOther air intake and maf/map codes
- P0101 Mass or volume air flow circuit range/performance
- P0102 Mass or volume air flow circuit low input
- P2015 Intake manifold runner position sensor circuit range/performance, bank 1
- P2009 Intake manifold runner control circuit low, bank 1
- P0113 Intake air temperature sensor 1 circuit high
- P2004 Intake manifold runner control stuck open, bank 1
- P0103 Mass or volume air flow circuit high input
- P0110 Intake air temperature sensor 1 circuit
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)