[SOLVED] Lincoln P0721 Code: Fast Fix For Output Shaft Sensor

The OBD code P0721 for Lincoln vehicles indicates a problem with the Output Speed Sensor (OSS) circuit.

This affects the transmission system, leading to issues like incorrect speedometer readings and transmission malfunctions.

The cause could be a faulty OSS, wiring harness issues, or a problematic PCM.

While not a severe issue, it should be addressed promptly.

A possible fix involves inspecting and repairing any damaged components or connections related to the OSS circuit.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

Symptoms of the Lincoln p0721 OBD Code

The vehicle may experience erratic shifting and poor acceleration with Lincoln fault code P0721.

When OBD code P0721 occurs in a Lincoln vehicle, symptoms may include: Engine Light ON.
Improper reading on the speedometer.
Transmission issues.

Causes of the Lincoln p0721 OBD Code

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Possible reasons for Lincoln fault code P0721 include issues with the output speed sensor circuit.

P0721 can be caused by a Faulty Output Speed Sensor (OSS).
An Output Speed Sensor harness that is open or shorted.
An Output Speed Sensor circuit with poor electrical connection.
Or a Faulty Powertrain Control Module (PCM).

Fixing Lincoln Error Code p0721 Step By Step

Address the faulty output speed sensor circuit in the Lincoln with code P0721 for resolution.

To fix the Lincoln OBDII code P0721, start by reviewing the possible causes related to the output speed sensor circuit.
Visually inspect the wiring harness and connectors for any damage or corrosion.
Check the connector pins for any signs of being broken, bent, or pushed out.
Test the output speed sensor for proper operation and replace it if necessary.
Clear the fault codes from the vehicle’s computer using a scan tool.
Take the vehicle for a test drive to ensure the issue has been resolved.

Cost Of Fixing Lincoln p0721 Fault Code

Diagnosing and repairing Lincoln fault code P0721 involves inspecting and possibly replacing the output speed sensor.

The cost to diagnose and fix a Lincoln OBD code P0721 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.

The total cost depends on labor rates, shop fees, and the complexity of the repair needed.

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Details of the Lincoln p0721 OBD Code

Fault code P0721 in a Lincoln indicates a problem with the output speed sensor circuit.

OBD code P0721 for a Lincoln indicates a problem with the Output Speed Sensor Circuit Range/Performance.

This code is triggered by the ECM when it detects that the signal from the output speed sensor is out of the expected range or not performing as it should.

The output speed sensor is responsible for monitoring the speed of the transmission output shaft.

If the sensor or its circuit has issues, it can lead to erratic shifting behavior or even transmission malfunctions in the vehicle.

Mechanic’s Tech Notes

Detailed information on diagnosing and repairing Lincoln fault code P0721 related to the output shaft speed sensor.

OBDII code P0721 in a Lincoln may indicate an issue with the output speed sensor circuit.

To diagnose, use a multimeter to check the TCM power and ground.

Verify TCM communication over the CAN network with a scan tool.

Inspect the wiring harness and connectors for damage, focusing on pin condition.

If no visible issues are found, consider reprogramming the TCM.

This process may require specialized equipment and software.

FAQ

1. What does OBD code P0721 mean in a Lincoln vehicle?

OBD code P0721 in a Lincoln means an issue with the Output Speed Sensor circuit. Check sensor, wiring, and connectors for faults to resolve transmission problems and incorrect speedometer readings.

2. What are the symptoms of a P0721 fault in a Lincoln car?

Symptoms of P0721 in a Lincoln: Engine Light ON, incorrect speedometer reading, transmission problems. Causes: Faulty OSS, wiring issues. Fix: Inspect and repair wiring and connectors.

3. How can I diagnose and repair a P0721 trouble code in my Lincoln vehicle?

Diagnose and repair a P0721 code in a Lincoln by checking the Output Speed Sensor, harness, and PCM for faults. Inspect wiring and connectors for damage or corrosion.

Lincoln p0721 error fault code explained

Wrap Up

If your Lincoln is displaying OBD code p0721 and experiencing shifting issues or erratic speedometer readings, it may be caused by a faulty output speed sensor, damaged wiring harness, or low transmission fluid level.

To address Lincoln OBD code p0721, first, inspect the wiring and connectors leading to the output speed sensor for any signs of damage or corrosion.

Next, test the output speed sensor using a multimeter to ensure it is functioning correctly.

If necessary, replace the output speed sensor and clear the fault code to resolve the issue.