DTC GMC C121C Short Explanation
Channel: Maxidot GMC
Date: 20/06/2020

The video focuses on the basic GMC 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

We will continue to work on improving the content.
Our efforts at Maxidot s.r.o.the video content gets better.

#maxidot #dtc #howto #diagnostictroublecode #gmc




Make:
GMC
Code:
C121C
Definition:
ThrottleorPedal Position SensororSwitch "A" Circuit RangeorPerformance Problem
Description:
Monitor runs whenever following DTCs are not present: None Either of the following conditions A or B is met: A.Engine switch: On (IG) B.Electric throttle motor power: ON Throttle position sensor malfunction (P0120, P0122, P0123, P0220, P0222, P0223, P2135): not detected
Cause:
 Throttle position sensor (built into throttle body) Throttle position sensor circuit ECM