What to Do After Replacing Crank or Camshaft Sensor and Now Engine Won't Start or Runs Rough

If you recently replaced the crank or camshaft position sensor in your vehicle and are experiencing issues such as the engine not starting or running rough, there are several potential causes and solutions to consider. Here are some common problems and fixes that can help resolve these issues:

Two common problems that occur after replacing a crank or camshaft position sensor are: the engine won't start, or the engine runs rough. Some possible causes include: the vehicle may require a reset or relearn procedure for those sensors, the wiring may have been damaged during installation, the sensor itself may be faulty, both the cam and crankshaft position sensors may need to be replaced, the sensors may not be working correctly together, the positioning of the sensors may be off, or a fuse may have blown during installation.

Reset and Relearn Procedure

Many vehicles have a reset or relearn procedure for their sensors. While some vehicles may relearn automatically, others may require manual intervention. Advanced OBD2 scan tools can often facilitate a sensor relearn, but manual procedures can also be found through online research specific to your vehicle.

Check Wiring and Fuses

Ensure that the wiring is properly connected and that there are no damaged wires. Additionally, check for any blown fuses, especially if there was any testing or shorting of circuits during sensor replacement.

Faulty Aftermarket Sensors

Low-cost aftermarket sensors may sometimes be faulty and not work correctly. If issues persist, consider replacing the sensor with a higher-quality part.

Positioning of Sensors

In some cases, the camshaft and crankshaft sensors need to be replaced from the same manufacturer and at the same time to ensure proper functioning. Incorrect positioning of the sensors during installation can also cause issues.

By addressing these potential causes and following appropriate troubleshooting steps, you can improve the performance of your vehicle after replacing the crank or camshaft position sensor.

Keywords

crankshaft position sensor, camshaft position sensor, vehicle issues, engine start problems, sensor replacement, faulty wiring, blown fuses, aftermarket sensors, sensor positioning

FAQ

Q: What are some common problems that occur after replacing a crank or camshaft position sensor?
A: Common issues include the engine not starting or running rough.

Q: What should be checked after replacing a sensor?
A: Ensure the wiring is properly connected, check for blown fuses, and verify the positioning of the sensor.

Q: How can the sensors be relearned for proper functioning?
A: Some vehicles may require a reset or relearn procedure, which can be done manually or with advanced OBD2 scan tools.