← Back to list

2011 Chevrolet Malibu P2135 Code: TPS Sensor Issue, Symptoms, and Fix in Winter Driving

Model: 2011 Chevy Malibu Fault Code: P2135 Posted: 2017-02-11 08:23

My 2011 Chevrolet Malibu's Check Engine light came on while driving in snowy conditions. Immediately after, the engine began stuttering, 'engine power reduced' appeared on the dashboard, and traction control activated — with a warning light also turning on. I was unable to exceed 30 MPH. With only about 20 miles remaining, I turned off the engine and restarted it. Miraculously, the car resumed normal operation and drove safely home, but the Check Engine Light remained illuminated. Using an OBD-II scanner, I retrieved a generic code: P2135 — 'Throttle Position Sensor (TPS) 1-2 Correlation Issue.' While this code is often linked to throttle body or TPS sensor problems, it can also stem from wiring faults, accelerator pedal issues, or ECU malfunctions. I'm unsure where to begin and what the most cost-effective troubleshooting steps are. Why did the car drive fine after a restart? Could this be a temporary glitch? Why does the traction control warning light activate every time a sensor fails — including when the barometric pressure sensor (which I recently replaced) malfunctions? Why does 'SERVICE ESC' appear on the dashboard repeatedly? This vehicle has only 60,000 miles and is a salvaged title with second-hand ownership. I am considering selling it and switching to a Hyundai. Given that I live in Maine during winter, what should my next steps be? Please advise — this issue feels beyond normal for a car of this age and mileage.

Related fault codes

P2135

Comments (5)

Anonymous 2017-02-11 14:59

You're not wrong to feel frustrated — especially with a salvaged title. Vehicles like this are often deemed unrepairable, which voids warranties under GM's '14582A Special Coverage Adjustment' policy for throttle body-related issues (e.g., reduced power mode). While the warranty may be voided due to salvage status, it’s worth contacting your local GM dealer to verify eligibility. P2135 specifically refers to a correlation issue between Throttle Position Sensor 1 and 2 — typically related to the throttle body. Modern vehicles integrate systems; when one sensor fails, others (like traction control) are affected due to shared diagnostics. Given your location in rural Maine during winter, consider a vehicle with better reliability — such as a Jeep or SUV. Cold weather can exacerbate sensor issues and throttle responsiveness.

Anonymous 2017-02-11 17:26

The car wasn't destroyed — it was rear-ended, the bumper was replaced, and the frame straightened. There's no visible damage now. In many ways, it functions like a new vehicle except for this recurring issue.

Anonymous 2017-02-11 18:10

A salvage title raises significant concerns about repairability — it may have been deemed not worth fixing. This makes any warranty claim difficult. Still, you should try contacting GM to access the '14582A Special Coverage Adjustment' policy for throttle body-related faults. It's a possibility worth exploring, though success is not guaranteed.

Anonymous 2017-04-08 17:39

The P2135 code is often caused by carbon buildup in the throttle body, not necessarily a faulty TPS sensor or pedal. Cleaning the throttle body with carburetor cleaner can resolve the issue and clear the code. After cleaning, engine performance should improve, and the traction control warning (SERVICE ESC) should disappear. This is a simple, low-cost fix worth trying first.

Anonymous 2017-08-06 11:58

I own an 2008 Saturn Aura — very similar to the Malibu — and have experienced this exact issue for six weeks. After replacing the throttle pedal sensor twice, I had it towed to a GM dealer. They diagnosed a faulty throttle body with carbon buildup. After spending nearly $1,000, the problem returned. A different GM dealer (with Saturn-certified technicians) found a bad ground in the throttle body wiring harness after extensive electrical testing. I'm now returning to the first dealer for a proper diagnosis and repair — they initially misdiagnosed it.