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Hey Fellow Owners!

Recently had my NPP exhaust replaced due to a bad butterfly valve—all under warranty.

Today while taking a short drive I noticed the CEL come up… drove it quite a lot over the weekend after the exhaust replacement without issue.

Noticed a weird shift before I saw the CEL, felt like it went from 2nd to 4th while in manual mode—but I could be wrong, was taking a turn while it happened.

Took a short drive home after I noticed it and no issues with the DCT, flicked through gears without issue, went into cylinder deactivation, no loss of power, etc.

Any similar experiences? Read through some American forums … everything from whole DCT replaced to Solenoid issues. Bringing it in on Friday.

Module Diagnostic Code Diagnostic Information Recommended Action
ECM - Engine System P0700 Transmission Control Module Requested Malfunction Indicator Lamp Illumination. The DTC is an informational DTC. The DTC indicates an emission related DTC set in the Transmission Control Module. Service within 7 days
SDM - Airbag System None No Error Code Found None
VIU - OnStar System None No Error Code Found None
TCM - Transmission System P2855 The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels. You may experience reduced power or shifting issues. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs. Service within 1 day
BOI - Bulb Outage Indicators None No Error Code Found None
ABS - Braking and Stability System None No Error Code Found None

Module	Diagnostic Code	Diagnostic Information	Recommended Action
ECM - Engine System	P0700	Transmission Control Module Requested Malfunction Indicator Lamp Illumination. The DTC is an informational DTC. The DTC indicates an emission related DTC set in the Transmission Control Module.	Service within 7 days
SDM - Airbag System	None	No Error Code Found	None
VIU - OnStar System	None	No Error Code Found	None
TCM - Transmission System	P2855	The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels. You may experience reduced power or shifting issues. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs.	Service within 1 day
BOI - Bulb Outage Indicators	None	No Error Code Found	None
ABS - Braking and Stability System	None	No Error Code Found	None

<blockquote data-quote="JimmyC8" data-source="post: 309788" data-attributes="member: 8632">Hey Fellow Owners! Recently had my NPP exhaust replaced due to a bad butterfly valve—all under warranty. Today while taking a short drive I noticed the CEL come up… drove it quite a lot over the weekend after the exhaust replacement without issue. Noticed a weird shift before I saw the CEL, felt like it went from 2nd to 4th while in manual mode—but I could be wrong, was taking a turn while it happened.Took a short drive home after I noticed it and no issues with the DCT, flicked through gears without issue, went into cylinder deactivation, no loss of power, etc.&nbsp; Any similar experiences? Read through some American forums … everything from whole DCT replaced to Solenoid issues. Bringing it in on Friday. <table style='width: 100%'><tr><th>Module</th><th>Diagnostic Code</th><th>Diagnostic Information</th><th>Recommended Action</th></tr><tr><td>ECM - Engine System</td><td>P0700</td><td>Transmission Control Module Requested Malfunction Indicator Lamp Illumination. The DTC is an informational DTC. The DTC indicates an emission related DTC set in the Transmission Control Module.</td><td>Service within 7 days</td></tr><tr><td>SDM - Airbag System</td><td>None</td><td>No Error Code Found</td><td>None</td></tr><tr><td>VIU - OnStar System</td><td>None</td><td>No Error Code Found</td><td>None</td></tr><tr><td>TCM - Transmission System</td><td>P2855</td><td>The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels. You may experience reduced power or shifting issues. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs.</td><td>Service within 1 day</td></tr><tr><td>BOI - Bulb Outage Indicators</td><td>None</td><td>No Error Code Found</td><td>None</td></tr><tr><td>ABS - Braking and Stability System</td><td>None</td><td>No Error Code Found</td><td>None</td></tr></table></blockquote>

[QUOTE="JimmyC8, post: 309788, member: 8632"] Hey Fellow Owners! Recently had my NPP exhaust replaced due to a bad butterfly valve—all under warranty. Today while taking a short drive I noticed the CEL come up… drove it quite a lot over the weekend after the exhaust replacement without issue. Noticed a weird shift before I saw the CEL, felt like it went from 2nd to 4th while in manual mode—but I could be wrong, was taking a turn while it happened. Took a short drive home after I noticed it and no issues with the DCT, flicked through gears without issue, went into cylinder deactivation, no loss of power, etc. Any similar experiences? Read through some American forums … everything from whole DCT replaced to Solenoid issues. Bringing it in on Friday. [TABLE] [TR] [TH]Module[/TH] [TH]Diagnostic Code[/TH] [TH]Diagnostic Information[/TH] [TH]Recommended Action[/TH] [/TR] [TR] [TD]ECM - Engine System[/TD] [TD]P0700[/TD] [TD]Transmission Control Module Requested Malfunction Indicator Lamp Illumination. The DTC is an informational DTC. The DTC indicates an emission related DTC set in the Transmission Control Module.[/TD] [TD]Service within 7 days[/TD] [/TR] [TR] [TD]SDM - Airbag System[/TD] [TD]None[/TD] [TD]No Error Code Found[/TD] [TD]None[/TD] [/TR] [TR] [TD]VIU - OnStar System[/TD] [TD]None[/TD] [TD]No Error Code Found[/TD] [TD]None[/TD] [/TR] [TR] [TD]TCM - Transmission System[/TD] [TD]P2855[/TD] [TD]The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels. You may experience reduced power or shifting issues. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs.[/TD] [TD]Service within 1 day[/TD] [/TR] [TR] [TD]BOI - Bulb Outage Indicators[/TD] [TD]None[/TD] [TD]No Error Code Found[/TD] [TD]None[/TD] [/TR] [TR] [TD]ABS - Braking and Stability System[/TD] [TD]None[/TD] [TD]No Error Code Found[/TD] [TD]None[/TD] [/TR] [/TABLE] [/QUOTE]

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