P2138 on CHEVROLET TAHOE
What P2138 Means on Your CHEVROLET TAHOE
Real CHEVROLET TAHOE Owner Reports (Source: NHTSA Complaints Database)
"P2138 code causing the car to have reduced engine power causing unsafe driving conditions and danger to other traffic. Vehicle has been to dealer multiple times for issue, ECM replaced costing thousands and still not working."
"I Keep getting code p2138 car stalls check engine light turns on, stability control flashes. I have to erase code to get it drive again, but will do it again soon. Been doing it for 4+ years now."
"My vehicle's throttle position sensor malfunctioned while I was driving on a busy highway at 55-60MPH, causing it to suddenly enter limp mode and display the error code P2138."
"The contact's brother owns a 2017 Chevrolet Tahoe. The contact stated that while driving 70 MPH, the check engine warning light illuminated, and the message "Reduced Engine Power" was displayed. Additionally, the vehicle decelerated to 20 MPH. The contact was able to pull to the side of the road."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P2138 on CHEVROLET TAHOE
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.