OBD-II code · Powertrain (generic)
P0655 Engine Hot Lamp Output Control Circuit
A circuit fault on the engine-hot warning lamp output - the high-coolant-temperature warning may not light when needed.
Is it safe to drive with P0655?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in lamp or wiring
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Engine Hot Lamp
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.