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Home >> Pontiac >> 2009 >> G8 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1423 >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2008 Pontiac G8. However, it is still accessible from the selected car via links, so may be relevant.

Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.5-15.5 V.