P0340 - OBD Trouble Code

<<See All OBD Codes

If you experience engine stalling or occasional loss of power and acceleration with affected fuel economy and engine misfires, you can suspect a problematic camshaft sensor or circuit that might have malfunctioned, thus indicating OBD code P0340 error in the Powertrain control module.

Error Code P0340 is a very common fault code. The ECM, PCM and many more use the CMP or also known as camshaft position sensor to easily figure out what it should set the timing at. This is an important tool, since without knowing what the right timing should be the computer is useless. The error code P0340 simply means that the computer has completely sent a signal to the camshaft position sensor however it does not see the right signal that is being returned from the sensor. Since the circuit is a concern, the problem could be in any component of the circuit such as PCM, wiring and sensor itself.

What causes this problem with the Camshaft Position Sensor Circuit Malfunction?

• Broken, shorted or grounded connector or wire in the route circuit
• Faulty Powertrain Control Module Circuit and damaged wirings open
• Faulty crankshaft position sensor
• Dead or weak battery
• Starting system circuit
• Faulty starter motor
• Poor electrical connection of the camshaft position sensor
• The harness of the camshaft position sensor is shorted or open
• Faulty camshaft position sensor

1. Camshaft Position Sensor - A faulty camshaft position sensor is usually the main reason for the OBD code P0340 to occur. Thus, replace immediately if needed.
2. Powertrain Control Module - Faulty PCM can store wrong codes and can lead to misdiagnosis. Thus, check for its replacement or reprogramming, as required.
3. Ignition Spark Plug - Check for faulty ignition spark plugs and replace as required. Buy now!
4. Timing Belt and Pulleys - P0340 can occur if the timing between the sensor and PCM is not correct. Buy new parts now!
5. Starter Motor - The engine will have problems with starting and will stall with the starter motor doesn’t work properly. Replace faulty motor now!
6. Car Battery & Cables - Damaged, corroded and faulty battery and cables can also be a reason for bad engine performance. Replace it now!
7. Diagnostic Tool - Use high grade diagnostic tools to resolve OBD code P0340 error. Visit us today to grab amazing deals.
   

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P0340 code by mentioning some major symptoms below:

Common Symptoms

• The Check Engine Light will come on
• The vehicle may not start, or may be difficult to start
• The vehicle may idle rough or stall
• The vehicle may misfire
• There may be a loss of power while driving

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0340:

• Make sure that the battery cable connections are tight and clean. Some people think that it is an obvious step, but if your computer does not get a steady feed of electricity from the battery, it can cause multiple issues.
• Check for wires and connectors that might be rubbed through, disconnected or loose. It is also important to check the fuse box in your vehicle together with the relay centre that can be found under the hood.
• It is also important to make sure that the fuses are good. Make sure that there is no melted plastic that can cause fire. These are some of the major wiring problems that you will encounter with error code P0340.
• Once you have completely checked all the obvious things and still you can’t find the right solution, then you have to begin suspecting either the computer or the sensor.
• The camshaft position sensor is defective. Unfortunately, there is no way for you to test it since it will take expensive test and equipment as well as well trained and fully skilled technician to the test the sensor.
• You can also consider the CMP sensor and install it. This will greatly help you to fix the problem however there is no guarantee without proper diagnosis.

However, if you face any issue then we have stocked a wide range of best priced Camshaft Position Sensor, Powertrain Control Module, Ignition spark, Battery, Starter Motor.

Here are some steps which you should follow in order to diagnose this fault code:

Visual Inspection – At the camshaft position sensor, make sure it is plugged in and firmly seated. Also, inspect the wiring harness to look for damage, such as from recent engine repairs, aftermarket installations, impact damage, or rodent damage.

Sensor Inspection

Resistance Check – Disconnect the sensor and measure resistance. An open-circuit, or short-circuit, at this point would tell you that the sensor itself is at fault.

Signal Check – The proper way to do this would be with a digital oscilloscope, but you can get a rough estimation of CMP sensor function by putting your DVOM in AC V mode. When cranking, you should be able to see at least 20 mV.

Electrical Inspection – Disconnect the ECM and CMP connectors, and put a short pin across the terminals of the CMP connection. Use a small paperclip or wire for this.

From the ECM side, check for resistance in the circuit itself. With the short pin in place, you should read less than 0.1 ohm. Any higher, and the ECU will be unable to detect the signal. Also check for a broken wire or corrosion somewhere in the circuit.

Remove the short pin and check for open circuit. If there is some amount of resistance, suspect a short circuit. Water in an intermediary connector could easily be the cause of short-circuit.

Check for short-to-ground by taking one of the leads and connecting it to body-ground or the negative battery terminal. You should read an open circuit, any unintentional connection to ground could distort or weaken the signal.

Other Problems – In case no problems can be found in the CMP sensor or its wiring, it may be that P0340 or P0345 are simply auxiliary fault codes. A jumped timing belt, faulty crankshaft position sensor signal or circuit, or engine misfire, may be the primary problem. Double check these before coming back to the CMP.

Common mistakes when diagnosing the P0340 code

It is important to inspect the wiring and connectors to rule them out as the cause of the problem before directly jumping to the camshaft sensor for replacement. This is the most common mistake when diagnosing the P0340 trouble code.

Another mistake that is made during the diagnostic procedure is neglecting to consider a misfiring problem or a crankshaft sensor problem as possible sources of the P0340 trouble code