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 MANUALSCHEVROLET2006CHEVY EXPRESS G3500, VAN CARGO, 4.8 VREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (ENGINE CONTROL SYSTEM - 6.6L (LLY) - DTC P0016 TO DTC P0342)DTC P0181CIRCUIT/SYSTEM TESTING
2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 V
Circuit/System Testing
2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 VSECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Disconnect the fuel temperature sensor.
- Turn ON the ignition, with the engine OFF.
- Observe the Fuel Temperature parameter with a scan tool.
- If the fuel temperature is warmer than -40° (-40°F), test the signal circuit for a short to ground.
- Connect a 3-amp fused jumper wire between the fuel temperature sensor signal circuit and the low reference circuit.
- If the fuel temperature is colder than 150°C (302°F), test for high resistance in the signal circuit or the low reference circuit.
- If all circuits test normal, refer to Component Testing in this diagnostic.
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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.