Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Chevrolet Cruze LS, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Cooling System Diagnostic Code Index
ENGINE COOLING SYSTEM DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC P00B3 or P00B4 | P00B3 00: Radiator Coolant Temperature (RCT) Sensor Circuit Low Voltage P00B4 00: Radiator Coolant Temperature (RCT) Sensor Circuit High Voltage |
| DTC P00B6 | P00B6 00: Radiator Coolant Temperature (RCT) - Engine Coolant Temperature (ECT) Not Plausible |
| DTC P00B7 | P00B7 00: Engine Coolant Flow Insufficient |
| DTC P0480, P0481, or P0482 | P0480 01: Cooling Fan Relay 1 Control Circuit Short to Battery P0480 02: Cooling Fan Relay 1 Control Circuit Short to Ground P0480 04: Cooling Fan Relay 1 Control Circuit Open P0480 54: Cooling Fan Relay 1 Control Circuit High Temperature P0481 01: Cooling Fan Relay 2 Control Circuit Short to Battery P0481 02: Cooling Fan Relay 2 Control Circuit Short to Ground P0481 04: Cooling Fan Relay 2 Control Circuit Open P0481 54: Cooling Fan Relay 2 Control Circuit High Temperature P0482 01: Cooling Fan Relay 3 Control Circuit Short to Battery P0482 02: Cooling Fan Relay 3 Control Circuit Short to Ground P0482 04: Cooling Fan Relay 3 Control Circuit Open P0482 54: Cooling Fan Relay 3 Control Circuit High Temperature |
| DTC P0597-P0599 | P0597 00: Engine Coolant Thermostat Heater Control Circuit P0598 00: Engine Coolant Thermostat Heater Control Circuit Low Voltage P0599 00: Engine Coolant Thermostat Heater Control Circuit High Voltage |
| DTC P0691-P0694 | P0691 00: Cooling Fan Relay 1 Control Circuit Low Voltage P0692 00: Cooling Fan Relay 1 Control Circuit High Voltage P0693 00: Cooling Fan Relay 2 Control Circuit Low Voltage P0694 00: Cooling Fan Relay 2 Control Circuit High Voltage |
| DTC P1258 | P1258: Engine Coolant Overtemperature - Protection Mode Active |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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