Reddit Validated Operating System Error Code P2135: How to Fix It

Q: Can I drive with error code P2135?

Driving short distances is possible, but the vehicle may enter limp mode, limiting speed and power. It's best to address the issue promptly to avoid potential stalling or poor engine performance.

Q: Is a throttle position sensor expensive to replace?

No, a TPS is usually an affordable part, typically costing between $30 and $100. Labor costs vary but replacement is straightforward for a DIYer.

Q: Can a dirty throttle body cause P2135?

Yes, carbon buildup on the throttle plate can affect the TPS voltage readings. Cleaning the throttle body with a throttle body cleaner may resolve the code in some cases.

Q: What is the difference between P2135 and P0121?

P0121 indicates the TPS signal is out of range, while P2135 specifically points to a correlation issue between two TPS signals (A/B voltage disagreement). Both often stem from a faulty sensor or wiring problem.

Q: Do I need to reprogram the ECM after replacing the TPS?

Not typically. Most vehicles learn the new sensor's range automatically during a test drive. However, some models may require a throttle position relearn procedure using an OBD2 scanner.

Abstract

Error code P2135 indicates that the throttle position sensors A and B are reporting conflicting voltage signals. This typically points to a faulty throttle position sensor (TPS), wiring issues, or a problem with the throttle body itself. If left unchecked, it can cause poor engine performance or even a no-start condition.