P0655Engine Hot Lamp Output Control Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- The engine module switches this hard-wired output with its own driver and checks the circuit electrically (open, short to ground or voltage) – it cannot see whether the lamp lights; on CAN-based cars such faults appear as U codes. P0655 concerns the engine hot or coolant warning lamp that the engine module switches by wire from the coolant temperature signal. CARB links overtemperature protection strategies to this lamp: a protective reaction that only starts after the hot lamp lights needs no MIL. No manufacturer document available to us uses this code; the description follows CARB and the component. If the circuit fails, the driver may not be warned of overheating – check it promptly even though the check engine light usually stays off. Actual overheating is P0217; the coolant sensor circuit is P0117/P0118.
- What you may notice
- Temperature warning lamp does not light at bulb check or when overheating
- Warning lamp stays on without overheating
- Code stored, check engine light depending on the maker
- Likely causes
- LikelyWire or connector between module and receiver open, corroded or shorted
- PossibleBulb/LED or instrument cluster faulty
- PossibleLamp supply missing (fuse)
- RareOutput driver in the module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.