P1235 High Pressure Fuel Pump Circuit (Direct Injection)
What does P1235 mean on a Toyota?
P1235. High Pressure Fuel Pump Circuit (Direct Injection). This Toyota-enhanced code applies to Toyota models with D-4S direct injection.
Common causes of P1235
- Failed high-pressure pump solenoid
- Open or shorted HP pump circuit
- Worn HP pump cam follower
- Corroded connector
- ECM driver fault
How to fix P1235
- Test HP pump solenoid resistance
- Check high-side fuel pressure
- Inspect the cam follower for wear
- Verify circuit wiring
- Replace the pump after circuit proof
Sources and review
- Last updated 2026-09-06.