Generic fault code
P0655 — Engine hot lamp output, control circuit: malfunction
The control unit stores code P0655 when it detects this fault: “Engine hot lamp output, control circuit: malfunction”.
Indicative severity: LowEngine (mechanical, cooling and lubrication)
Reviewed by Daniel Morales, founder of Reprorace SL, on
What does code P0655 mean?
The engine's mechanics, timing (camshaft and crankshaft), cooling and lubrication. Many of these codes check that the engine is in time and at the right temperature.
- System
- P · Powertrain
- Area
- Engine (mechanical, cooling and lubrication) · Car system: Engine and lubrication
- Type
- Generic (SAE J2012 / ISO 15031-6): the same meaning on every make
- Indicative severity
- Low. Check at the next service; usually does not affect safety or driveability.
What usually causes code P0655?
- Open circuit (broken wire or terminal)
The most likely causes come first. Only a check on the car confirms which one is yours.
What are the symptoms of code P0655?
- A rough engine or loss of power
- Limp-home mode in some cases
- Engine warning light on
These are the usual symptoms of this kind of fault: not all of them always appear, and sometimes you notice nothing.
Can I keep driving with code P0655?
Usually yes, with care. This kind of fault does not usually affect safety or how the car drives, but have it checked at the next service. If you notice anything different (jerking, noises, smells, smoke or a red warning light), stop somewhere safe and get advice.
This is guidance only: only someone who checks the car can say whether it is safe to drive.
An indicative description of the code's generic meaning. Each manufacturer may give it a different meaning, conditions or tests: always follow its service information and your workshop's advice.
What you can do yourself
For this kind of fault
Notice when the fault appears (cold, warm, when accelerating) and write it down with the code: it helps the workshop reproduce it.
Read the code and keep the report: with an ECO-LITE in the OBD socket you see it on your phone or computer, with the data captured when the fault happened.
Look for anything obvious: a loose connector, a disconnected hose, a fuel cap not closed properly or a low fluid level. Do not take apart anything you do not know.
Clear the code only after writing it down or after the repair. Clearing turns the light off, but it also deletes the freeze-frame data and the readiness monitors used at the inspection.
Drive normally for a few days and read the codes again. If the code comes back, the fault is still there: book the workshop and bring the report.
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Related codes
- P061CInternal control module engine RPM: performance
- P061DInternal control module engine air mass: performance
- P0654Engine RPM, output circuit open
- P0725Engine speed, input circuit: malfunction
- P0726Engine speed, input circuit: range/performance
- P0728Engine speed, input circuit: intermittent
P06xx codes: computer and output circuits
In the glossary
Read more: Remote OBD diagnostics: what it is, how it works and what it can't do