DTC cadillac C121A-09 Short Explanation
Channel: Maxidot Cadillac
Date: 2020-06-20

The video focuses on the basic Cadillac specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make:
Chrysler
Code:
C121A 09
Definition:
Lost Brake Switch Message
Description:
The Powertrain Control Module (PCM) doesn&#39;t receive a brake switch signal from the Anti-lock brake Module over the CAN C bus.
Cause:
BRAKE PEDAL POSITION SENSOR WIRING ISSUESBRAKE PEDAL POSITION (BPP) SENSORANTI-LOCK BRAKE MODULEPOWERTRAIN CONTROL MODULE (PCM)
Failure Type:
Component Failure
This sub type is used for Component Failures that cannot be assigned to a specific sub type.