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Wiring diagrams Section: Testing & Diagnostics

Engine Controls - 3.5L - Introduction (1 of 2)

Engine Controls - 3.9L - Introduction (1 of 2)

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P0118 or P1115 Chevrolet Uplander I

Testing & Diagnostics

The engine is running for more than 30 seconds. OR
The ignition is ON and the IAT is more than 0°C (32°F).
The diagnostic runs continuously when the above conditions are met.