OBD-II Generic Error Code P2137: How to Fix It

Q: Is it safe to drive with a P2137 code?

Driving with P2137 is not recommended. This code often triggers reduced engine power or limp mode, which limits your speed and acceleration. While the vehicle may still drive short distances, unpredictable throttle response can create unsafe conditions, especially in traffic or on the highway. Get it diagnosed as soon as possible.

Q: What is the most common cause of P2137?

The most common causes are a faulty accelerator pedal position sensor assembly, a failing throttle body with an integrated throttle position sensor, or damaged wiring and connectors in the sensor circuits. Corrosion in connectors is also a frequent culprit, especially in older vehicles or those in high-humidity climates.

Q: Can I fix P2137 by just clearing the code?

Clearing the code without fixing the underlying problem will only cause it to return, often within the same or next drive cycle. P2137 is a hard fault that requires the sensor voltage correlation issue to be actually resolved before the code will stay cleared.

Q: How much does it cost to fix error code P2137?

Repair costs vary by vehicle and root cause. Replacing an accelerator pedal position sensor assembly typically costs $50–$200 in parts, plus 1–2 hours of labor. A throttle body assembly replacement generally runs $100–$400 in parts depending on the vehicle, plus labor. Wiring repairs vary widely. Always get a proper diagnosis before replacing parts to avoid unnecessary expenses.

Q: Does P2137 affect fuel economy?

Yes, P2137 can negatively affect fuel economy. When the ECM detects a sensor correlation fault, it may default to a conservative or limp-mode fuel strategy, altering throttle response and fueling. Additionally, a sticky or inaccurate throttle body can cause inefficient combustion. Fixing the underlying cause will typically restore normal fuel economy.

Abstract

Error code P2137 indicates that your vehicle's ECM (Engine Control Module) has detected a voltage mismatch between the throttle position sensor (TPS) and the accelerator pedal position sensor (APPS) on the A/C signal circuits. This correlation failure means the two sensors are not agreeing with each other, which can cause reduced engine power, hesitation, or limp mode. Left unresolved, P2137 can lead to unsafe driving conditions, so it should be addressed promptly.