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Home >> Chevrolet >> 2000 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1635: 5-Volt Reference 1 Circuit >> Conditions For Running DTC
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Conditions For Running DTC

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The engine is running.

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