SureTrack Community Fix: Stuck Buick Turbo

Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand product.

Sometimes you go through all the documented testing steps for a problem and still can’t find the solution. When this happens, turning to your fellow techs is a great solution. SureTrack community member candtauto had a Buick Regal Turbo in the shop with a code P2261 for a stuck turbo bypass valve. They posed the question to the community, and with the help of fellow community member dmckemie12 and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

2011 Buick Regal CXL Turbo 2.0L

P2261 Turbo Bypass Valve Stuck Closed, replaced vacuum tank.

Customer states that check engine light is on.

Diagnostic Steps Performed/Parts Replaced
Checked for codes and found P2261, Turbo Bypass Valve Stuck Closed. Replaced bypass valve and solenoid, smoke test found no leaks. Substituted Good MAF and MAP sensor. The MAP is reading 15 at idle, vacuum gauge reads cold 11 PSI, snap the throttle and it goes to 18. There is no audible sound heard when you snap the throttle, valve appears to be working.

Best Answer from Community Member dmckemie12
The vacuum tank also has an internal check valve, make sure it is working.

Vacuum tank was the cause.

Replaced vacuum tank, cleared codes and road tested vehicle. Code did not return.

SureTrack® adds to the power of ProDemand® with an exclusive combination of real-world knowledge and powerful diagnostic tools, all wrapped in an interactive community of professional technicians. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.