Mitsubishi Code P0037 indicates the heated oxygen sensor (rear) heater control circuit is malfunctioning. This code is triggered when the heated oxygen sensor (rear) heater current remains below 0.17 ampere for more than two seconds, and the voltage remains below 2.0 volts for two seconds. This malfunction can be caused by various issues, such as an open or shorted heater circuit, harness damage, a failed heated oxygen sensor (rear) heater, connector damage, or a faulty ECM. Identifying the cause to repair the malfunction and prevent further damage is essential.
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Causes and Solutions for Mitsubishi Code P0037
| Cause | Solution |
|---|---|
| Open or shorted heated oxygen sensor (rear) heater circuit | Inspect and repair the course for any damages or shorts. |
| Harness damage | Replace the damaged harness with a new one. |
| The heated oxygen sensor (rear) heater failed | Replace the failed sensor with a new one. |
| Connector damage | Replace the damaged connector with a new one. |
| ECM failed | Replace the ECM with a new one. |
Open or Shorted Heated Oxygen Sensor (Rear) Heater Circuit
When the Mitsubishi Code P0037 is triggered, it could be caused by an open or shorted heated oxygen sensor (rear) heater circuit. This issue can be resolved by inspecting and repairing the course for damages or shorts. This should be done by a professional mechanic who is familiar with the system and can ensure that the repairs are done correctly.
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Harness Damage
The Mitsubishi Code P0037 can also be triggered by harness damage. In this case, the damaged harness must be replaced with a new one. A professional mechanic should also do this to ensure the new harness is installed correctly and does not cause further damage.
The heated Oxygen Sensor (Rear) Heater Failed
If the heated oxygen sensor (rear) heater has failed, the Mitsubishi Code P0037 will be triggered. In this case, the failed sensor must be replaced with a new one. Again, this should be done by a professional mechanic to ensure the new sensor is installed correctly and does not cause further damage.
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Connector Damage
Connector damage is another common cause of the Mitsubishi Code P0037. If so, the damaged connector must be replaced with a new one. A professional mechanic should do this to ensure that the new connector is installed correctly and does not cause further damage.
ECM Failed
The final common cause of the Mitsubishi Code P0037 is a failed ECM. In this case, the ECM must be replaced with a new one. As with all of the other causes, this should be done by a professional mechanic to ensure that the new ECM is installed correctly and does not cause any further damage.
Conclusion: Resolving Mitsubishi Code P0037
Mitsubishi Code P0037 indicates the heated oxygen sensor (rear) heater control circuit is malfunctioning. This code can be caused by issues such as an open or shorted heater circuit, harness damage, a failed heated oxygen sensor (rear) heater, connector damage, or a faulty ECM. Identifying the cause to repair the malfunction and prevent further damage is essential. The solutions for the most common causes of the Mitsubishi Code P0037 are to inspect and repair the circuit for any damages or shorts, replace the damaged harness with a new one, replace the failed sensor with a new one, replace the damaged connector with a new one, and replace the ECM with a new one. By doing this, the Mitsubishi Code P0037 can be resolved, and further damage can be prevented.