OBD-II Generic Error Code P0655: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
Error Code
P0655
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P0655 indicates a problem with the engine hot lamp output control circuit. This means the powertrain control module (PCM) has detected a malfunction in the circuit that controls the engine hot warning lamp on your dashboard. While not immediately critical, it should be addressed to ensure you're warned of overheating issues.
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Tools You'll Need

How to Fix Error Code P0655

  1. Check for Other Codes and Inspect Dashboard

  2. Visual Inspection of Wiring and Connectors

    Disconnect the negative battery terminal before working on electrical components.
  3. Test the Engine Hot Lamp Bulb/LED

    Be careful when removing the instrument cluster; refer to the vehicle's service manual if needed.
  4. Check the Engine Coolant Temperature Sensor (ECT)

    Allow the engine to cool before working near the cooling system.
  5. Inspect the PCM Fuses and Relays

    Use a fuse puller or rubber gloves to avoid electric shock.
  6. Test PCM Power and Ground Circuits

    Avoid shorting pins; use a wiring diagram for accurate pin identification.
  7. Consider PCM Replacement

    PCM replacement is complex and should be done by a professional if you are not experienced.

Parts You May Need

Engine hot warning bulb/LED
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Engine coolant temperature sensor (ECT)
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PCM fuses and relays
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PCM (Powertrain Control Module)
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Engine hot warning bulb/LED
Check Price on Amazon
Engine coolant temperature sensor (ECT)
Check Price on Amazon
PCM fuses and relays
Check Price on Amazon
PCM (Powertrain Control Module)
Check Price on Amazon
Engine hot warning bulb/LED
Check Price on Amazon
Engine coolant temperature sensor (ECT)
Check Price on Amazon
PCM fuses and relays
Check Price on Amazon
PCM (Powertrain Control Module)
Check Price on Amazon
Engine hot warning bulb/LED
Check Price on Amazon
Engine coolant temperature sensor (ECT)
Check Price on Amazon
PCM fuses and relays
Check Price on Amazon
PCM (Powertrain Control Module)
Check Price on Amazon
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When to Call a Professional

If you have checked all wiring, sensors, and the bulb without success, the PCM may need replacement. Professional diagnosis is recommended if you are not comfortable with electrical testing or if the error persists after basic checks.

Frequently Asked Questions

Can I drive with error code P0655?
Yes, you can usually drive, but the engine hot lamp may not work, so you risk overheating without warning. It's best to fix it promptly.
Will P0655 clear itself?
It might if the fault is intermittent, but it's more likely to return until the underlying issue is fixed. A diagnostic scan is recommended.
What does 'engine hot lamp output control circuit' mean?
This refers to the electrical circuit that controls the dashboard warning lamp for engine overheating. The PCM detects a problem in that circuit.
How much does it cost to fix P0655?
Costs vary: a simple fuse or bulb replacement may cost under $20, while a PCM replacement can exceed $500. Diagnostic fees are typically around $100.
Is P0655 the same as P0650?
No, but they are related. P0650 is a general malfunction indicator lamp (MIL) control circuit issue, while P0655 is specific to the engine hot lamp. They may share similar causes.