The P0655: Engine Hot Lamp Output Control Circuit Malfunction code refers to a problem in the engine hot lamp control circuit. This lamp is responsible for warning the driver when the engine temperature is too high. A malfunction in this circuit could result from a faulty control circuit, wiring issues, or a defective engine hot lamp.
P0655 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0655: Engine Hot Lamp Output Control Circuit Malfunction |
| Is it serious? | Yes, as it prevents proper warning when the engine overheats, leading to potential engine damage. |
| Possible causes | – Faulty engine hot lamp output control circuit – Wiring issue – Faulty engine hot lamp |
| How to diagnose? | – Test engine hot lamp output control circuit – Inspect wiring and connectors – Replace engine hot lamp if necessary |
P0655 Meaning
The P0655 code indicates that the control module has detected a problem with the engine hot lamp control circuit. This lamp warns the driver when the engine’s temperature exceeds a safe limit. If this circuit fails, the driver may not be alerted to overheating, which can lead to severe engine damage if not addressed in time.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for other related codes that may provide additional insight into cooling system or sensor issues. | OBD-II Scanner |
| Test the Engine Hot Lamp Output Control Circuit | Use a multimeter to measure the voltage in the engine hot lamp control circuit to ensure it is functioning correctly and providing the appropriate output. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to the engine hot lamp for signs of damage, loose connections, or corrosion that could cause a malfunction. | Flashlight, Multimeter |
| Test the Engine Hot Lamp | Test the engine hot lamp to confirm whether it is operational. If the lamp is faulty or not illuminating when it should, replace it. | Diagnostic Tool, Multimeter |
| Replace the Engine Hot Lamp if Necessary | If the engine hot lamp is faulty and not responding correctly, replace it to restore proper function and prevent engine damage. | Replacement Lamp, Tools |
| Clear the Code and Test | After completing repairs, clear the code using an OBD-II scanner and test the vehicle to ensure the engine hot lamp is functioning as expected. | OBD-II Scanner, Vehicle Manual |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko