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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System & Fuel System - 3.6L - DTC P0335 To DTC P2097) >> DTC P0685, P0686, P0687, P0689, or P0690 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: A condition with the powertrain (PT) relay will set multiple DTCs. The DTCs listed in the table will only set if a condition exists with the PT relay.
Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance
B+ Supply Voltage - Coil P0685 P0685 P0685 - -
B+ Supply Voltage - Switch - P0689 P0689 P0690 -
Relay Control Circuit P0686 P0685 P0685 P0687 P0685
Ignition 1 Voltage Circuit - P0689 P0689 P0690 -