P1151 Subaru Code - Rear Oxygen Sensor Heater Circuit High Input
Quick Answer
P1151 Subaru indicates Rear Oxygen Sensor Heater Circuit High Input. Common causes include Faulty Rear Oxygen Sensor, Rear Oxygen Sensor harness is open or shorted, Rear Oxygen Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1151 Subaru indicates Rear Oxygen Sensor Heater Circuit High Input.
- Common causes
- Common causes include Faulty Rear Oxygen Sensor, Rear Oxygen Sensor harness is open or shorted, Rear Oxygen Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1151 Subaru Description
What are the Possible Causes of the DTC P1151 Subaru?
- Faulty Rear Oxygen Sensor
- Rear Oxygen Sensor harness is open or shorted
- Rear Oxygen Sensor circuit poor electrical connection
How to Fix the DTC P1151 Subaru?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1151 Subaru code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1151 Subaru Code
1. What are the common symptoms of OBDII code P1151 in a Subaru related to the rear oxygen sensor heater circuit high input?
The common symptoms may include poor fuel economy, a decrease in engine performance, rough idling, and the illumination of the check engine light.
2. What typically causes the OBDII code P1151 in a Subaru, indicating a high input in the rear oxygen sensor heater circuit?
The code P1151 is usually triggered by a malfunction in the rear oxygen sensor heater or its circuit, such as a faulty sensor, damaged wiring, or a blown fuse.
3. How can I diagnose the OBDII code P1151 in my Subaru related to the rear oxygen sensor heater circuit high input?
Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the rear oxygen sensor and its wiring for any visible damage, and testing the sensor's heater circuit for proper voltage and resistance.
4. Can I continue driving my Subaru with the OBDII code P1151 indicating a high input in the rear oxygen sensor heater circuit?
It is generally not recommended to drive for an extended period with this issue, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter. It's best to address the problem promptly.
5. How can I repair the OBDII code P1151 in my Subaru related to the rear oxygen sensor heater circuit high input?
Repair options may include replacing the rear oxygen sensor, repairing damaged wiring or connectors, checking and replacing fuses if necessary, and clearing the error code with an OBDII scanner.
6. Are there any DIY tips for troubleshooting the OBDII code P1151 in a Subaru myself?
If you have the necessary tools and knowledge, you can start by visually inspecting the rear oxygen sensor and its wiring for any visible issues before proceeding to testing the sensor's heater circuit with a multimeter.
7. What is the role of the rear oxygen sensor in a Subaru, and why is its heater circuit important?
The rear oxygen sensor monitors the exhaust gases and helps adjust the air-fuel mixture. The heater circuit ensures the sensor reaches operating temperature quickly for accurate readings, improving engine performance and emissions.
8. Can extreme weather conditions or environmental factors trigger the OBDII code P1151 in a Subaru related to the rear oxygen sensor heater circuit high input?
Yes, extreme cold temperatures or exposure to moisture can potentially affect the rear oxygen sensor's heater circuit, leading to a high input error code like P1151.
9. How long does it typically take to repair the OBDII code P1151 in a Subaru caused by a high input in the rear oxygen sensor heater circuit?
The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it can take anywhere from 30 minutes to a few hours to diagnose and repair the problem.
10. Is it necessary to reset the ECU after fixing the OBDII code P1151 in a Subaru related to the rear oxygen sensor heater circuit high input?
Yes, it's recommended to reset the ECU or clear the error code using an OBDII scanner after completing the repair to ensure the system recognizes the issue has been resolved.
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