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2020 Cadillac CT4-V: Service Bulletin: #PIP5675F: MIL illuminated with DTC P1098 and/or P26BB - (Oct 14, 2020)

#PIP5675F: MIL illuminated with DTC P1098 and/or P26BB - (Oct 14, 2020)

Subject MIL illuminated with DTC P1098 and/or P26BB

Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Buick

Encore GX

2020

All

All

1.3 L3T

All

Cadillac

CT4 CT4-V

2020

All

All

2.0 LSY and 2.7 L3B

All

Cadillac

CT5

2020

All

All

2.0 LSY

All

Cadillac

XT4

2019-2020

All

All

2.0L LSY

All

Cadillac

XT5

2020

All

All

2.0 LSY

All

Chevrolet

Blazer

2020

All

All

2.0 LSY

All

Chevrolet

Trailblazer

2021

All

All

1.3 L3T

All

GMC

Acadia

2020

All

All

2.0 LSY

All

 

Involved Region or Country

North America

Condition

Some customers may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history.

Cause

This may be caused by a software anomaly, GM is currently looking into the issue.

Correction

Note: For 2019MY vehicles equipped with the 2.0L LSY refer to 19-NA-022 first, to verify the vehicle has the most current level of software 

Note: For 2019MY and 2020MY Chevrolet Silverado or GMC Sierra vehicles equipped with the 2.7L L3B, refer to 20-NA-100.

Check VIN history to determine if one or both of these codes have previously set in the ECM.

 If the vehicle has set either code previously, replace the Coolant Flow Control Valve.

 If the vehicle has not set either code previously, perform the latest SI diagnostic for the code.

If the SI diagnostic fails to isolate the root cause, do not replace the Coolant Flow Control Valve.

Clear any codes and return the vehicle to the customer.  

If either code is set current, and the SI diagnostic isolates the root cause to the Coolant Flow Control Valve, replace the valve and perform the scan tool control function: Engine Coolant Control Valve Mode.

The value should increase and decrease according to the command in the scan tool.

Clear any codes and return the vehicle to the customer.  

In the event that the customer returns with either DTC set a second time, replace the valve and perform the scan tool control function: Engine Coolant Control Valve Mode.

 

Warranty Information

For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.

Labor Operation

Description

Labor Time

4087438

Complete published diagnostics and clear DTC's

0.4 Hr.

*This is a unique Labor Operation for Bulletin use only.


Version

6

Modified

09/10/2019 - Created on.

01/17/2020 updated to include reference to 19-NA-022.

03/16/2020- Updated to include additional vehicle model

04/07/2020- Updated to include additional vehicle platforms equipped with 1.3 L3T engine.

05/20/2020 Updated to include unique labor operation.

06/24/2020 Updated to remove 2019 and 2020 MY Chevrolet Silverado and GMC Sierra vehicles and to add note to refer to 20-NA-100.

10/14/2020 Corrected engine displacement in red note section to 2.7L.

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