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P2135 code Engine power reduced

23472 Views 7 Replies 7 Participants Last post by  Cavid Shirxanzada
Hey guys. So on Wednesday during the blizzard in the Midwest region, my 2012 Cruze Eco MT check engine light came on. Soon after, three messages showed up on the DIC: Service stabilitrac, service traction control, and engine power reduced. I shut the car off, turned it back on, and the engine went back to normal power mode. However, the check engine light persisted. The code it is throwing is P2135, which is throttle/pedal position sensor/switch A/B voltage correlation. I was wondering if anyone else has experienced this code, or the related symptoms, and how I would go about resolving this.

Upon startup, the car starts fine, but after about five minutes switches to engine power reduced mode. Also, the temperature here is 15 degrees F.

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Mine did that last year on the coldest days. Limp mode and everything. Swapped the throttle body. No more issues. What happens is the throttle position sensor on the throttle body becomes delaminated and causes a reading error.
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