P2255 Mercury Code - O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1
Quick Answer
The P2255 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the O2 sensor negative current control circuit on Bank 2 Sensor 1. Common causes include Faulty O2 sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P2255 Mercury indicates O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty O2 sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P2255 Mercury Description
The P2255 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the O2 sensor negative current control circuit on Bank 2 Sensor 1. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A "low" signal from this sensor suggests that the sensor is not generating enough voltage, which can lead to an incorrect fuel mixture and poor engine performance.
Common Causes of P2255 Mercury
- Faulty O2 sensor
- Wiring or connector issues in the sensor circuit
- ECM software or hardware problems
- Exhaust leaks near the sensor
- Engine misfires or mechanical issues affecting sensor readings
Symptoms of P2255 Mercury
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Check Engine light illuminated
- Failed emissions test
How to Fix P2255 Mercury
- Begin by diagnosing the specific cause of the issue using a scan tool to read the code and live data from the O2 sensor.
- Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
- Test the O2 sensor itself to determine if it is functioning properly; replace if defective.
- Check for exhaust leaks near the sensor and repair as needed.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P2255 Mercury
The cost of repairing a P2255 O2 sensor negative current control circuit low code can vary depending on the specific cause of the issue. In general, the price range for parts such as an O2 sensor can be between $50-$200, with labor costs ranging from $100-$300. Overall, the total repair cost could fall within the range of $150-$500. It's important to note that diagnostic time and labor rates can vary by location and shop, so it's recommended to obtain quotes from multiple sources to get an accurate estimate.
Need more information about the P2255 Mercury code?
Need more information on how to fix the P2255 Mercury code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2255 Mercury code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2255 Mercury Code
No Frequently Asked Questions about P2255 Mercury Code found.
Discuss the causes and fixes for P2255 Mercury OBDII Code
Code P2255 Mercury comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.