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.
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HOMESERVICE MANUALSCHEVROLET2006RV CUTAWAY 6.6 2REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - 6.6L (LLY) - DTC P0016 TO DTC P0342DTC P0128CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet RV Cutaway 6.6 2
Circuit/System Verification
2006 Chevrolet RV Cutaway 6.6 2SECTION Circuit/System Verification
- If the ignition has been OFF for 10 hours or more, the ECT and the IAT should be within 6°C (11°F) of each other and also the ambient temperature. Turn ON the ignition with the engine OFF and use a scan tool to observe the IAT and the ECT sensor parameters.
- Inspect the ECT sensor terminals for corrosion and for engine coolant leaking through the sensor.
- Use the scan tool to verify the proper operation of the engine cooling fans.
- Turn OFF the ignition.
- Inspect the cooling system surge tank for the proper engine coolant level. Refer to Cooling System Leak Testing and Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac N Fill) .
- Verify the proper heat range and the operation of the thermostat. Refer to Thermostat Diagnosis .
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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.