Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble controlling the light that tells you the engine is too hot.
The P0655 code is triggered when the Engine Control Module (ECM) detects a malfunction in the circuit that controls the engine hot warning lamp.
The P0655 code indicates a problem with the circuit responsible for illuminating the engine hot warning lamp. This circuit is used by the ECM to alert the driver if the engine temperature exceeds safe operating limits. A fault in this circuit can prevent the warning lamp from functioning correctly, potentially leading to engine overheating without the driver's knowledge.
• Engine hot warning lamp does not illuminate
• Engine overheating without warning
• Check Engine Light may be on
• Faulty engine hot warning lamp
• Open or shorted wiring in the circuit
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Inspect the engine hot warning lamp for functionality.
• Check wiring and connectors for damage or corrosion.
• Test the ECM for proper operation.
• Replace the engine hot warning lamp if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly check the engine temperature gauge.
• Ensure proper coolant levels and condition.
• Inspect wiring and connectors during routine maintenance.
Circuit Issue
• Do not ignore the Check Engine Light.
• Monitor engine temperature closely.
• Seek professional diagnosis if unsure.
Check with your vehicle's manufacturer for warranty coverage on electrical components.
The P0655 code has been reported in various vehicles, often due to aging electrical systems or poor maintenance.
Moderate – While the engine may not be overheating immediately, failure to address the issue can lead to severe engine damage.
Driving with an unknown engine temperature can lead to overheating and engine damage. Ensure repairs are performed by a qualified technician.
• Engine at normal operating temperature
• Ignition in the ON position
The engine hot warning lamp is typically located on the dashboard, while the ECM is usually found in the engine bay or under the dashboard.
Q: Can I drive my car with a P0655 code?
A: It's not recommended to drive for long periods with this code, as you may not be alerted to engine overheating.
Q: How do I reset the P0655 code?
A: After repairs, the code can be reset using an OBD-II scanner. However, ensure the issue is fixed first.
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