- Replace Oxygen Sensor
- Replace ECM
If you own a Subaru and you have a P1151 code, you know how frustrating it can be to diagnose and repair the issue. The code stands for Rear Oxygen Sensor Heater Circuit High Input and can cause poor driveability. Understanding the cause and solution of this code is essential to properly servicing the vehicle. To help you out, this article outlines the causes and solutions of the Subaru P1151 Code.
Causes and Solutions of Subaru P1151 Code
| Causes | Solutions |
|---|---|
| Check input signal for ECM | Replace Oxygen Sensor |
| Check any other DTC on display | Replace ECM |
| Failed Oxygen Sensor Heater | Clean and Reset Throttle Body |
| Damaged Oxygen Sensor | Replace Oxygen Sensor Wiring |
Check Input Signal for ECM
The first step when diagnosing the Subaru P1151 Code is to check the input signal for the ECM. An input signal is a signal sent from another device to the ECM which provides information about the engine and its condition. If the input signal is incorrect, then the ECM will not be able to properly diagnose and repair the issue.
Check Any Other DTC on Display
After checking the input signal for the ECM, you should also check any other DTC (Diagnostic Trouble Codes) on the display. DTCs are codes that indicate what type of issue is causing the Subaru P1151 code. If there are any other DTCs on the display, then you should address them before continuing with the diagnosis.
Failed Oxygen Sensor Heater
The next step is to check the oxygen sensor heater. The oxygen sensor heater is responsible for heating the oxygen sensor, which helps the ECM to accurately measure the oxygen level in the exhaust. If the heater is not functioning properly, then it can cause the Subaru P1151 Code to be triggered.
Damaged Oxygen Sensor
Finally, you should check the oxygen sensor itself. If the oxygen sensor is damaged or malfunctioning, then it can cause the Subaru P1151 Code to be triggered. If the oxygen sensor is found to be faulty, then it should be replaced.
Conclusion
In conclusion, diagnosing and repairing the Subaru P1151 Code can be a difficult task. However, understanding the causes and solutions of the code can help to make the repair process much easier. By checking the input signal for the ECM, any other DTCs on the display, the oxygen sensor heater, and the oxygen sensor itself, you can properly diagnose and repair the Subaru P1151 Code and get your vehicle back on the road. With the proper diagnosis and repair, you can ensure that your Subaru is running properly and avoid any further issues with the P1151 code.
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