OBD2 Error Code P0137: How to Fix It

Q: What causes OBD2 error code P0137?

P0137 is typically caused by a faulty downstream oxygen sensor, damaged wiring, exhaust leaks near the sensor, or rarely a failing catalytic converter affecting sensor readings.

Q: Can I drive with P0137 error code?

While you can drive short distances, P0137 affects fuel economy and emissions. Extended driving may damage the catalytic converter and trigger additional codes. Get it repaired promptly.

Q: How much does it cost to fix P0137?

DIY repair costs $50-150 for a new oxygen sensor. Professional repair ranges from $200-400 including labor. Costs increase significantly if exhaust repairs or catalytic converter replacement is needed.

Q: How do I know if it's the oxygen sensor or wiring?

Test the sensor voltage with a multimeter while engine is running. If voltage is consistently low and wiring appears intact, the sensor needs replacement. Damaged wiring will show erratic or no voltage readings.

Q: Will P0137 cause my car to fail emissions testing?

Yes, P0137 will cause emissions test failure in most states. The downstream oxygen sensor monitors catalytic converter efficiency, which is required for emissions compliance.

Abstract

OBD2 error code P0137 indicates that your vehicle's oxygen sensor (Bank 1, Sensor 2) is reading abnormally low voltage. This downstream oxygen sensor monitors exhaust gases after the catalytic converter and helps your engine's computer optimize fuel mixture and emissions control.