OBD2 Error Code P0122: How to Fix It

Q: Can I drive with OBD2 error code P0122?

You should avoid driving with P0122 as it can cause unpredictable engine behavior, poor acceleration, and potential safety issues. The vehicle may enter limp mode or stall unexpectedly.

Q: What causes throttle position sensor to fail?

Common causes include normal wear over time, carbon buildup on the throttle body, damaged wiring, corrosion in connectors, or contamination from oil or coolant leaks affecting the sensor.

Q: How much does it cost to replace a throttle position sensor?

A throttle position sensor typically costs $50-$150 for the part, with labor adding $100-$200 if done professionally. DIY replacement can save significantly on labor costs.

Q: Will P0122 cause my car to fail emissions testing?

Yes, P0122 will likely cause your vehicle to fail emissions testing as it indicates a malfunction in the engine management system. The code must be resolved and the readiness monitors completed before testing.

Q: Can a dirty throttle body cause P0122?

Yes, excessive carbon buildup on the throttle body can interfere with proper throttle plate movement and affect TPS readings, potentially triggering P0122. Cleaning the throttle body is often part of the diagnostic process.

Abstract

OBD2 error code P0122 indicates that your vehicle's throttle position sensor (TPS) is sending a low voltage signal to the engine control module. This means the sensor isn't properly detecting throttle position, which can cause poor acceleration, rough idling, and reduced fuel economy.