P1235 — Throttle / MAF Plausibility (Volumetric Efficiency)
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P1235 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1235 means on specific makes
Mitsubishi CAUTION
On Mitsubishi (notably Evo X), this flags a mass-airflow vs throttle plausibility fault — actual volumetric efficiency differs from the estimated VE from main/sub throttle position over a short window. Often appears with airflow/throttle/boost mods or sensor faults.
- MAF sensor reading off / dirty ($100-300)
- Intake leak or aftermarket intake skewing airflow
- Throttle position sensor fault
- Boost/airflow modification mismatch
Check first: Verify MAF scaling and check for intake leaks and throttle sensor accuracy; common on modified Evo X. Confirm exact definition against model-year service data.
Source: cobbtuning.atlassian.net Evo X DTCs, mitsubishi-forums.com