What is the P0037 fault code What is the description for the Heater Control Circuit Low (Bank 1) malfunction of the Heated Oxygen Sensor? How can you fix P0037 fault code What are the causes and symptoms of the P0037 error code?
What is the P0037 Fault code? What does it signify?
An engine must have the right air-fuel ratio to function efficiently. The PCM/ECM determines how much fuel is injected into an engine. Sensors around the engine help it calculate the correct levels. Its most important sensor is the oxygen (O2) sensor.
The oxygen sensors are located prior to the catalytic convertor (sensor 1) and afterwards the catalytic convertor (sensor 2). When calculating fuel delivery, the PCM uses signal 1 from sensor 1. When determining the state or the catalytic converter, it primarily uses the signal of sensor 2.
To function correctly and send accurate information, every oxygen sensor must be warmed up. A heater wire is located inside the sensor to speed up its temperature rise. When it receives low or no voltage signals from the heater control circuit (Sensor 2), the PCM will set fault code P0037. This is after the catalytic convert. Bank 1 refers the engine side with the number 1 Cylinder.
This fault code is very common for Toyota, VW (especially Nissan Titan), Ford, Honda and Chevrolet as well as Hyundai, Audi, Acura and Subaru.
What is the P0037 Fault Code?
- – Defective oxygen sensor (Bank 1 Sensor 2)
- – Circuit to heat O2 with defective sensor
- If applicable, – Blow the O2 sensor fuse
- – Heater control circuit problems, such as poor connections and damaged wiring
What are the symptoms of the P0037 Fault Code?
Your vehicle will start if there is no fault in the oxygen sensor heater circuit. You may notice the following symptoms.
- – Illumination and control of the check engine light
- – A rise in exhaust emission values
- – PCM may put the engine into safe mode
- Engine performance issues
- – Increased fuel consumption
How do I fix the P0037 fault code?
- – Run a road check and reset any fault codes.
- – Inspect the O2 sensor wiring connections and wires if the code is returned. Overheating in the exhaust can often cause damage to cables. You can repair the cables if they are damaged due to overheating in the exhaust. Inspect connector connections, tighten if loose.
- – It is possible that the fuse in the O2 sensor heater circuit has blown. Replace the fuse if needed.
- To test the O2 sensor, use a voltmeter. If the O2 sensors is damaged, it should be replaced.
How Serious Is the P0037 Fault Coding?
The PCM puts the engine into safe mode when it detects an O2 sensor heater circuit fault. The vehicle manufacturer and vehicle model can vary the effects of safe mode. The safe mode will be activated until the problem is resolved. You may experience symptoms such as engine hesitation, erratic operations and decreased engine performance. To prevent further damage, the fault should be identified as soon as possible.
