Replaced camshaft position sensor but still get code problem! If you’re experiencing a Check Engine Light (CEL) and are getting a P0340 code, it could be a result of a bad camshaft position sensor. A CMP sensor replacement may be the solution, but sometimes the code persists even after replacing the sensor. In this case, there could be an underlying issue that needs to be addressed. Keep reading to find out more.
What Error Codes Show By Camshaft Position Sensor Problems?
When your car’s computer detects an issue with the camshaft position sensor, it’ll throw one of the following codes:
P0340: Camshaft Position Sensor Circuit Malfunction
P0341: Camshaft Position Sensor Circuit Range/Performance
P0342: Camshaft Position Sensor Circuit Low Input
P0343: Camshaft Position Sensor Circuit High Input
What Does P0340 Error Code Mean?
When your car’s computer detects an issue with the camshaft position sensor circuit, it’ll throw the P0340 code. This means that there’s a problem with the wiring or connection to the sensor, or that the sensor itself is damaged.
What Causes Camshaft Position Sensor Problems?
The camshaft position sensor is located near the crankshaft, and it uses a magnet to read the engine speed and sends this information to the car’s computer. Over time, the sensor can become dirty or damaged, which can cause it to fail. Other causes of camshaft position sensor problems include:
- Wiring issues
- A build-up of oil or debris on the sensor
- A problem with the sensor itself
How To Fix The P0340 Code
You know there are many reasons why a code still expires. So if you’re still noticing the code after replacing the camshaft position sensor, you need to check all components that could be causing the problem.
Here are some possible fixes; you can try to fix the problem.
1: Relearn Or Recalibrate The Sensor
Most of the time, after replacing a sensor, if the sensor is not relearned, the ECU may store old sensor data, causing the code to throw. Therefore, follow the steps below to relearn the camshaft position sensor:
Step 1: Turn on the vehicle and connect the OBD2 scanner tool. Open the scanner tool and select your vehicle make and model. Or select the auto-detect option. It will automatically read your system. You can use the MaxiSys scanner tool for better output.
Step 2: Go to the Diagnostics option and follow the order of the images below.
Step 3: Go to Special Features Options and Relearn Cam Crank Options. A new window will notify you when you should relearn the sensor. After reading, select OK.
Step 4: Then the scanner will ask you to start the engine. Start the engine. Now you need to wait until the engine coolant temperature reaches the desired temperature. Accelerate the vehicle to increase the temperature. After reaching the desired temperature, the vehicle automatically performs the teach-in process.
Note: Dodge Jeep Chrysler once demonstrated this process. The process is pretty much the same for other vehicles.
2: Check The O-Rings
You have to use two o-rings on the camshaft sensor for it to work. One with a camshaft position sensor and the other from the automaker.
The camshaft position sensor has an O-ring attached to the main unit. But it looks like a plastic comb. Because of this, many people think the o-ring is missing and they try to install the old o-ring into the new o-ring, which creates an obstacle to proper installation and creates a gap that causes problems.
If you put the old o-ring on the new o-ring, it will need to be removed. Then you have to use the original O-ring. Also clean the O-rings before use.
3: Test And Fix Camshaft Position Sensor Wiring
If relearning doesn’t fix the problem and the code still shows up, it’s usually related to the wiring that sends a signal to the ECU in question. To do this, you need to test the camshaft sensor harness to find the fault and fix the problem.
The wiring section varies by vehicle brand. You must do the correct checks in the following order:
Analyze the wiring diagram:
You typically get three wires in the camshaft position sensor. They come in a variety of colors and may vary by vehicle. The wiring is called power, sensor signal, and sensor ground.
Sensor Power Test:
Start the test with power. For this, you need to use a multimeter. Set the multimeter with PIN 1 and check the voltage. If the voltage is about 5 amps, the circuit power supply is working fine.
Sensor Ground Circuit Test:
Use a multimeter to check the continuity of the ground circuit between the sensor harness and the ECM harness. Also make sure there is continuity. Otherwise, there is a problem with the grounding circuit.
Sensor Signal Circuit Test:
You will also need to test the continuity between the cam sensor and the ECM harness connector. Continuity must be required to function properly.
If you find that one of the cables is defective, it will need to be repaired or replaced. If you have no technical knowledge, please seek professional help.
4: Check The Reluctor Wheel
If the wiring and relearning don’t work, there may be a problem with the reluctor wheel. The reluctor wheel is what tells the sensor where the engine is in its rotation. If it’s damaged, it can cause problems.
5: Inspect Timing Chain Or Belt
If the reluctor wheel is fine, there may be a problem with the timing chain or belt. The timing chain or belt keeps the engine in time. If it’s damaged, it can cause problems.
To check this, you need to remove the camshaft position sensor and look at the timing chain or belt. If you see any damage, it will need to be replaced.
If you find that your timing chain is causing this problem, it’s time for an upgrade! This can cost between $200-1000 depending on the make and model of vehicle.
6: Inspect Starter Motor
If the timing chain or belt is fine, there may be a problem with the starter motor. The starter motor is what starts the engine. If it’s damaged, it can cause problems.
7: Inspect Ecu
The vehicle electronic control unit gets the signal from camshaft position sensor and if wiring sends proper message, you still get code. It may occur due to ECU malfunction or simply because it’s not working properly but most likely an issue with your airbag system which needs fixing immediately!
Video How To Fix P0340 Code
>>> See more:
- How to temporary fix for crankshaft position sensor.
- What happens if you disconnect throttle position sensor.
FAQs About Replaced Camshaft Position Sensor But Still Get Code
What To Do Before And After Replacing A Camshaft Sensor?
Before you replace the camshaft sensor, it’s important to check the wiring and relays. If they are working properly, then you can proceed with the replacement. After you replace the sensor, it’s important to test the new sensor to make sure it’s working properly.
How Much Does It Cost To Replace A Camshaft Sensor?
The cost of replacing a camshaft sensor can vary depending on the make and model of your vehicle. It typically costs between $100-$150 to replace the sensor.
My Car Is Stalling, Is It The Camshaft Sensor?
If your car is stalling, it may be the camshaft sensor. However, it’s important to check the wiring and relays first. If they are working properly, then you can proceed with the replacement.
How Often Should I Change My Engine Oil?
It’s typically recommended to change your engine oil every 5,000 miles. However, it’s important to consult your owner’s manual for specific recommendations.
How Do You Reset A Camshaft Sensor Without A Scanner?
To reset a camshaft sensor without a scanner, you need to disconnect the battery for 30 seconds. This will reset the sensor and clear any codes.
Can I Drive With A Camshaft Position Sensor Problem?
It’s not recommended to drive with a camshaft position sensor problem. The sensor is responsible for timing the engine, and if it’s not working properly, it can cause serious engine damage.
Do You Have To Relearn Camshaft Sensors?
Typically, you don’t have to relearn camshaft sensors. However, some vehicles may require it. Consult your owner’s manual for specific instructions.
If you have replaced your camshaft position sensor and are still getting a code, it is most likely due to a faulty connection or damaged wiring. You will need to check the connections and wiring to see if they are damaged or loose. If everything looks fine, then you may need to replace the computer itself. Answer The Question hopes this article was helpful in troubleshooting your car’s issues. If you have any further questions, feel free to reach out to us.