Code 41
- Intermittent HEGO circuit (SIG or GND circuit).
- If Code 65 also present, repair faulty HEGO circuit (SIG or GND circuit).
- If Code 43 also present, service Code 43 first.
- Low fuel pressure at WOT, check fuel supply.
- Low fuel flow at WOT (pressure okay), check clogged injectors or low battery voltage.