P0137 P0137 OBD-II: Low Voltage in O2 Sensor Circuit
What P0137 means for you
The code indicates a moderate issue with the oxygen sensor circuit, which can affect vehicle performance and emissions.
Symptoms
- The Check Engine Light is activated
- The vehicle may experience rough idling or performance issues
- Fuel efficiency may decline
- Exhaust may emit a foul odor
- In rare instances, the driver may not notice any significant issues
Common causes
- The oxygen sensor's role is to assess the oxygen levels in exhaust gases post-combustion, which is essential for the powertrain control module (PCM) to optimize fuel efficiency. If the PCM identifies a malfunction in the sensor or the data it receives, it triggers code P0137.
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Send your ECUWhat this code means
Code P0137 signifies that the oxygen sensor circuit is reporting low voltage. This can lead to improper fuel mixture adjustments, causing performance issues and elevated emissions.
How a workshop diagnoses it
1. Use a high impedance Digital Volt Ohm Meter (DVOM) to check the voltage at the oxygen sensor connector. 2. Verify that the heater circuit is receiving the correct voltage and ground. 3. Inspect the sensor and wiring for any visible damage or loose connections. 4. Conduct a test drive to replicate the conditions that caused the code to set, monitoring load, speed, and RPM.
Frequently asked questions
It is not advisable to continue driving with a P0137 code, as it can lead to decreased fuel efficiency and increased emissions.
The cost to repair a P0137 code typically ranges from $100 to $300, depending on whether the oxygen sensor needs replacement or if there are other underlying issues.
A P0137 code indicates that the oxygen sensor circuit is reporting low voltage, which can affect engine performance and emissions control.
