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Home >> Chevrolet >> 2006 >> Chevy Express G2500, Van Cargo Extended, 6.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.6L (LLY) - DTC P0016 To DTC P0342 >> DTC P0181 >> Circuit/System Testing

Circuit/System Testing

  1. Disconnect the fuel temperature sensor.
  2. Turn ON the ignition, with the engine OFF.
  3. 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.
  4. 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.
  5. If all circuits test normal, refer to Component Testing in this diagnostic.
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