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Engine-Codes – Mercury – P0722 Mercury

P0722 Mercury Code - Output Shaft Speed Sensor No Signal

Quick Answer

The P0722 diagnostic trouble code (DTC) specifically refers to the Output Shaft Speed Sensor No Signal in a Mercury vehicle. Common causes include Faulty output shaft speed sensor, Damaged or corroded wiring/connectors, ECM malfunction. 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
P0722 Mercury indicates Output Shaft Speed Sensor No Signal.
Common causes
Common causes include Faulty output shaft speed sensor, Damaged or corroded wiring/connectors, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0722 Mercury Description

The P0722 diagnostic trouble code (DTC) specifically refers to the Output Shaft Speed Sensor No Signal in a Mercury vehicle. The output shaft speed sensor is a crucial component of the transmission system that monitors the speed of the output shaft, which is responsible for transferring power from the transmission to the wheels. When the sensor fails to provide a signal to the vehicle's engine control module (ECM), it can lead to a range of performance issues and potential long-term effects if not addressed promptly.

OBDII Code P0722 Mercury - Output Shaft Speed Sensor No Signal
P0722 Mercury Code - Output Shaft Speed Sensor No Signal

Common Causes of P0722 Mercury

  1. Faulty output shaft speed sensor
  2. Damaged or corroded wiring/connectors
  3. ECM malfunction
  4. Transmission fluid contamination
  5. Mechanical issues within the transmission system

Symptoms of P0722 Mercury

  1. Rough or delayed shifting between gears
  2. Stuck in one gear or inability to shift gears
  3. Engine stalling or hesitation during acceleration
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix P0722 Mercury

  1. Begin by diagnosing the issue using a scan tool to confirm the P0722 code and identify any other related codes.
  2. Inspect the output shaft speed sensor, wiring, and connectors for any visible damage or corrosion. Replace or repair as needed.
  3. Test the output shaft speed sensor using a multimeter to check for proper operation.
  4. If the sensor is functioning correctly, check the transmission fluid level and quality. Perform a transmission fluid flush and filter replacement if necessary.
  5. Clear the DTCs from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0722 Mercury

The cost of repairing a P0722 code in a Mercury vehicle can vary depending on the specific model, year, and extent of the issue. Typically, replacing the output shaft speed sensor and addressing any related wiring or connector issues can range from $150 to $300 in parts and labor. Additional costs may apply if the ECM needs to be replaced or if there are underlying transmission problems that require attention.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0722 Mercury Code

1. What are common symptoms of OBDII code P0722 on a Mercury vehicle?

The common symptoms of OBDII code P0722 on a Mercury vehicle include issues with shifting gears, erratic speedometer readings, and the transmission going into limp mode.

2. What does the OBDII code P0722 Mercury indicate?

OBDII code P0722 on a Mercury indicates that the vehicle's engine control module (ECM) has detected no signal from the output shaft speed sensor.

3. What are possible causes of the output shaft speed sensor no signal error (P0722) on a Mercury?

Possible causes of the output shaft speed sensor no signal error (P0722) on a Mercury include a faulty speed sensor, damaged wiring or connectors, low transmission fluid, or a malfunctioning ECM.

4. How can I diagnose the output shaft speed sensor issue causing OBDII code P0722 on my Mercury?

To diagnose the output shaft speed sensor issue causing OBDII code P0722 on your Mercury, you can use a scan tool to check for the code, inspect the wiring and connectors for damage, and test the sensor's resistance and output voltage.

5. Can a faulty output shaft speed sensor be repaired, or does it need to be replaced to resolve OBDII code P0722 on a Mercury?

In most cases, a faulty output shaft speed sensor causing OBDII code P0722 on a Mercury will need to be replaced with a new sensor to resolve the issue effectively.

6. Is it safe to continue driving my Mercury with OBDII code P0722 (Output Shaft Speed Sensor No Signal)?

It is not recommended to continue driving your Mercury with OBDII code P0722, as it can lead to further transmission problems and potential safety hazards. It's best to address the issue promptly.

7. How much does it typically cost to replace the output shaft speed sensor on a Mercury to fix OBDII code P0722?

The cost of replacing the output shaft speed sensor on a Mercury to fix OBDII code P0722 can vary depending on the model and labor rates, but it generally ranges from $100 to $300 for the sensor itself, plus labor costs.

8. Can a DIY enthusiast replace the output shaft speed sensor on a Mercury to clear OBDII code P0722?

Replacing the output shaft speed sensor on a Mercury to clear OBDII code P0722 can be a moderately challenging task, so it's recommended to have some mechanical experience and the necessary tools before attempting a DIY repair.

9. After replacing the output shaft speed sensor to address OBDII code P0722 on my Mercury, do I need to reset the code or will it clear on its own?

After replacing the output shaft speed sensor to address OBDII code P0722 on your Mercury, you may need to use a scan tool to reset the code and clear the error message from the ECM memory.

10. Will fixing OBDII code P0722 on my Mercury improve the vehicle's performance and fuel efficiency?

Fixing OBDII code P0722 on your Mercury by resolving the output shaft speed sensor issue can improve the vehicle's performance, transmission operation, and fuel efficiency, restoring normal driving conditions.

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