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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (ENGINE CONTROLS - 6.6L - DIAGNOSIS (DTCs P0016-P0401)) >> DTC P0181 >> Circuit/System Testing

Circuit/System Testing

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  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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