26 Mass air flow or vane air flow sensor out of self test range
How to read it
Code 26 reads as 2 flashes, pause, 6 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.
New to flash codes? The OBD-I code reading guide walks through the paperclip method, code 12, and reading two-digit codes.
What does Ford code 26 mean?
26. Mass air flow or vane air flow sensor out of self test range. This code sets when your vehicle computer detects mass air flow or vane air flow sensor out of self test range.
Common causes of 26
- Intake leak/blockage
- Wiring
- MAF sensor
- ECM
How to fix 26
- Check for an intake leak or a blockage
- Check the circuit wiring and harness for damage, chafing or a poor splice
- Test the MAF sensor and replace it only if it fails its own test
- Test the ECM last, only after every circuit test has passed
- Clear the code, then retest to confirm the fix holds