OBD-II Error Code B0159: How to Fix It

Q: Can I drive with OBD-II code B0159?

Yes, you can drive with code B0159 as it's not a safety-critical issue. However, your climate control system may not function properly, and the outside temperature display will be inaccurate.

Q: How much does it cost to fix B0159 error code?

Fixing B0159 typically costs $50-200 if you need to replace the outside temperature sensor yourself. Professional repair costs range from $150-400 depending on labor rates and whether additional wiring repairs are needed.

Q: What causes the outside temperature sensor to fail?

Common causes include exposure to road salt and moisture causing corrosion, physical damage from road debris, age-related sensor deterioration, and damaged wiring from vibration or rodent activity.

Q: How do I know if my outside temperature sensor is working?

Check if the outside temperature display on your dashboard or climate control matches the actual ambient temperature. If it shows extremely high or low readings, or doesn't change when temperature conditions change, the sensor may be faulty.

Q: Will B0159 cause my car to fail inspection?

In most areas, B0159 will not cause an emissions test failure since it's a comfort system code, not an emissions-related code. However, check your local inspection requirements as some areas may flag any stored diagnostic codes.

Abstract

OBD-II error code B0159 indicates that your vehicle's outside temperature sensor is sending a signal that's too high to the climate control module. This usually means the sensor circuit is damaged, the sensor itself has failed, or there's a wiring issue causing incorrect readings.