Hi-ya! good afternoon, today we will made an article about Error P0051 – how to fix?
Code Definition P0051
HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
What does the code P0051 mean
This code is set when the vehicle computer, the engine control module (ECM), detects a low system voltage on the heater control circuit. Specifically, the code refers to sensor 1 in bank 2. The code refers to sensor 1 in bank 2. The glow plug circuit of the heated oxygen sensor is designed to heat the sensor before the vehicle reaches operating temperature for an accurate reading. This code can be seen from P0052.
What causes the code P0051?
- Sensor 1 failure in bank 2
- Bad connection or disconnected connector
- Open or short circuit in the wiring
- Heater circuit fuse blown
- ECM failure
What are the symptoms of the P0051 code?
With the code P0051, the car will continue to run and drive; in most cases, an illuminated Check Engine light on the dashboard will be the only noticeable symptom. Low fuel economy may be noticeable and the vehicle may run erratically.
How can a mechanic diagnose the code P0051?
- Use a professional scanning tool to check all current codes (must be used to view live sensor data).
- Observe and note down all Freeze Frame data that is associated with the code (for use during your test drive).
- After confirming the P0051 code, clear the code and conduct a test drive in the same conditions as shown in the data from the frozen frame.
- If P0051 reappears, perform a visual inspection to verify the integrity of the wiring and sensor.
- If the previous step is OK, perform a scan with the Live Data Monitoring Tool from Sensor 1 in Bank 2.
- Check and test the ECM if the sensor is OK.
Common errors when diagnosing the P0051 code
While the sensor itself is usually the cause of P0051, it is imperative that you use the correct tools and perform the entire diagnostic procedure without skipping any steps to avoid unnecessary repairs. Monitoring sensor data with the scan tool’s live data stream is the only way to verify proper operation, and the sensor should not be replaced until it has been tested.
How serious is the P0051 code?
The P0051 code has symptoms that are easy to deal with, but like any other code, it should be fixed as soon as possible. In the rare event that a vehicle malfunctions and fuel consumption drops, it is advisable to drive carefully to avoid problems.
What repairs can fix the code P0051?
- Bank sensor replacement 2 1
- Correct connection problems and reinstall connectors.
- Repair any open or shorted wires.
- Replace the heating circuit fuse
- ECM replacement
- The P0051 can usually be repaired quickly for a reasonable cost by any qualified mechanic.
Additional notes for code P0051
If there is a blown fuse in the heater control circuit, there is always a cause for it; usually it is a short circuit in the wiring. The fuse must be replaced after the wiring is repaired.
A professional scanning tool is required to accurately and quickly diagnose P0051. A professional scanning tool allows us to live view sensor data such as voltage and resistance. Additionally, it shows us changes in sensor readings as they occur.
Code Definition P0051
HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
What does the code P0051 mean
This code is set when the vehicle computer, the engine control module (ECM), detects a low system voltage on the heater control circuit. Specifically, the code refers to sensor 1 in bank 2. The code refers to sensor 1 in bank 2. The glow plug circuit of the heated oxygen sensor is designed to heat the sensor before the vehicle reaches operating temperature for an accurate reading. This code can be seen from P0052.
What causes the code P0051?
- Sensor 1 failure in bank 2
- Bad connection or disconnected connector
- Open or short circuit in the wiring
- Heater circuit fuse blown
- ECM failure
What are the symptoms of the P0051 code?
With the code P0051, the car will continue to run and drive; in most cases, an illuminated Check Engine light on the dashboard will be the only noticeable symptom. Low fuel economy may be noticeable and the vehicle may run erratically.
How can a mechanic diagnose the code P0051?
- Use a professional scanning tool to check all current codes (must be used to view live sensor data).
- Observe and note down all Freeze Frame data that is associated with the code (for use during your test drive).
- After confirming the P0051 code, clear the code and conduct a test drive in the same conditions as shown in the data from the frozen frame.
- If P0051 reappears, perform a visual inspection to verify the integrity of the wiring and sensor.
- If the previous step is OK, perform a scan with the Live Data Monitoring Tool from Sensor 1 in Bank 2.
- Check and test the ECM if the sensor is OK.
Common errors when diagnosing the P0051 code
While the sensor itself is usually the cause of P0051, it is imperative that you use the correct tools and perform the entire diagnostic procedure without skipping any steps to avoid unnecessary repairs. Monitoring sensor data with the scan tool’s live data stream is the only way to verify proper operation, and the sensor should not be replaced until it has been tested.
How serious is the P0051 code?
The P0051 code has symptoms that are easy to deal with, but like any other code, it should be fixed as soon as possible. In the rare event that a vehicle malfunctions and fuel consumption drops, it is advisable to drive carefully to avoid problems.
What repairs can fix the code P0051?
- Bank sensor replacement 2 1
- Correct connection problems and reinstall connectors.
- Repair any open or shorted wires.
- Replace the heating circuit fuse
- ECM replacement
- The P0051 can usually be repaired quickly for a reasonable cost by any qualified mechanic.
Additional notes for code P0051
If there is a blown fuse in the heater control circuit, there is always a cause for it; usually it is a short circuit in the wiring. The fuse must be replaced after the wiring is repaired.
A professional scanning tool is required to accurately and quickly diagnose P0051. A professional scanning tool allows us to live view sensor data such as voltage and resistance. Additionally, it shows us changes in sensor readings as they occur.
