2020 Corvette: Service Bulletin: #PIP5757A: Service Engine Soon Light/Message with DTCs P1967 or P1968 in the TCM - (Nov 2, 2020)

#PIP5757: Service Engine Soon Light/Message with DTCs P1967 or P1968 in the TCM - (Oct 13, 2020)

Subject:  Service Engine Soon Light/Message with DTCs P1967 or P1968 in the TCM

Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Chevrolet

Corvette

2020

All

All

All

M1L

 

Involved Region or Country

North America

Condition

Service engine tell-tale or message with stored TCM DTCs or P1967 and or P1968

Cause

TCM Software anomaly 

Some customers may comment on a service engine telltale, reduced engine power message with no noticeable performance issues. When scanning the vehicle for DTCs the technician may find P0700 stored in the ECM and P1967, P1968 stored in the TCM. If there are other DTCs in the TCM diagnose those first as per service information. 

If only DTCs P1967 or P1968 are set, then reprogram the transmission control module with the latest available software.

 

Version

2

Modified

10/12/2020 - Created on.

11/02/2020 - Updated repair information

 

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