DTC GMC C0196-18 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

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Make:
GMC
Code:
C0196 18
Definition:
Post Catalyst Fuel Trim System Too Rich (Bank 1)
Description:
Engine started,battery voltage must be at least 11.5v,all electrical components must be off,the ground between the engine and the chassis must be well connected,the exhaust system must be properly sealed between the catalytic converter and the cylinder head,and the oxygen sensor heater for oxygen sensor before the catalytic converter must be properly functioning.The DME detected a problem with the fuel mixture.Trim control 1 segment (precision controller with oxygen sensor behind cat. ) below delta lambda threshold of less than -1.56. Coolant temperature greater than 45 degrees Celsius.O2 heaters ready,fuel system in a closed loop,but the rear O2 sensor is in voltage outside the parameters.Note: For resistance testing of sensor heating,oxygen sensor should be cooled to ambient temperature.High temperatures at oxygen sensor may lead to inaccurate measurements.
Cause:
 Oxygen sensor (before catalytic converter) is faulty Oxygen sensor (behind catalytic converter) is faulty Oxygen sensor heater (before catalytic converter) is faulty Oxygen sensor heater (behind catalytic converter) is faulty Check circuits for shorts to each other,ground or power
Failure Type:
Circuit Current Below Threshold
This sub type is used for failures, where the control module measures current flow below a specified range.