Ford’s code P0055 indicates a malfunction in the Heated Oxygen Sensor (HO2S) heater control circuit. It means the heater’s current requirements are either too low or too high. This issue is commonly caused by an open VPWR circuit, an open HO2S heater circuit, a short in the HO2S heater circuit in the harness, or a damaged HO2S heater. Understanding the causes and solutions of this code is critical to getting your Ford vehicle back on the road.
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Causes and Solutions for Ford Code P0055
| Cause | Solution |
|---|---|
| Open VPWR circuit | Check the voltage of the VPWR circuit and make sure it is within the specified range. |
| Open HO2S heater circuit | Check if the HO2S heater circuit is empty or has any other issues. |
| Short in the HO2S heater circuit in the harness | Inspect the HO2S heater circuit wiring harness and replace it if damaged. |
| Damaged HO2S heater | Replace the HO2S heater if it is damaged or defective. |
Detecting an Open VPWR Circuit
When your Ford vehicle throws an error code P0055, it is likely due to an open VPWR circuit. You should check the VPWR voltage with a multimeter to detect this issue. If the voltage is below the specified range, the VPWR circuit is open and needs to be repaired.
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Inspecting HO2S Heater Circuit
Sometimes, the code P0055 could mean that the HO2S heater circuit is open or has other issues. To detect this issue, you should inspect the HO2S heater circuit wiring harness and replace it if it is damaged.
💥See also: Ford Code P2610
Replacing HO2S Heater
Finally, if a damaged HO2S heater causes the code P0055, you should replace it. Make sure to use a genuine Ford part for the replacement, as this will ensure your vehicle’s best performance.
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Conclusion
Ford’s code P0055 indicates a malfunction in the Heated Oxygen Sensor (HO2S) heater control circuit. It can be caused by an open VPWR circuit, an open HO2S heater circuit, a short in the HO2S heater circuit in the harness, or a damaged HO2S heater. To resolve this issue, you should check the VPWR voltage, inspect the HO2S heater circuit wiring harness, and replace the HO2S heater if it is damaged. With the proper knowledge and understanding of Ford Code P0055, you can get your car back on the road quickly.
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