The P0038 code is a generic OBD-II trouble code that indicates a problem with the oxygen sensor (O2) heater control circuit for bank 1, sensor 2. Bank 1 refers to the side of the engine that contains cylinder 1, and sensor 2 is the downstream oxygen sensor. The O2 sensor heater control circuit is responsible for heating the O2 sensor to its operating temperature, which is necessary for the sensor to function properly.
When the P0038 code is set, it means that the powertrain control module (PCM) has detected a high voltage in the O2 sensor heater control circuit. This could be due to a number of factors, including:
What are the symptoms of code P0038?
- Illuminated check engine light
- Reduced fuel economy
- Increased emissions
- Engine may run rough or stall
- Oxygen sensor may be damaged
What are the reasons for the P0038 code?
- Open or shorted O2 sensor heater control circuit
- Faulty O2 sensor
- Faulty PCM
What is the solution of code P0038?
- Inspect the O2 sensor heater control circuit for open or shorts
- Replace the O2 sensor if it is faulty
- Replace the PCM if it is faulty
Summary
The P0038 code is a serious code that can lead to engine damage if not repaired. It is important to have the code diagnosed and repaired as soon as possible to avoid further problems.
If you are experiencing any of the symptoms of the P0038 code, it is important to have your vehicle inspected by a qualified technician as soon as possible.