DTC P1A84 Cadillac
Abnormality in Stoplight Switch Circuit
Abnormality in Stoplight Switch Circuit
Description
This diagnostic trouble code is set in the following case. 1). When the vehicle has run for a long time with the stoplight switch turned ON. 2). When there is difference between the stoplight state and the vehicle’s behavior.
Cause and Solution
Malfunction of the stoplight relay Malfunction of the stoplight Damaged wiring harness and connectors ETACS-ECU malfunction ASC-ECU malfunction
Video Guide
Diagnostic Info
- DTC Code: P1A84
- Brand: Cadillac