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Code P0345: Camshaft Position Sensor Circuit Malfunction Bank 2

So you just got your car diagnosed and you’re wondering, “How do I fix trouble code P0345?” While this issue is complex, you can still take care of it yourself.

1. What Are the Symptoms?

A code P0345 is always accompanied by symptoms, most of which are impossible to miss:

  • Stalling or hesitating
  • No start
  • Hard start
  • Slow or delayed start
  • Check engine light is on
  • Runs roughly
  • Noticeably reduced engine performance
  • Poor fuel economy
  • Rough idling
  • Exhaust pipe releases smell of gas
  • Misfiring

2. What Does the Error Code Mean?

What does the code P0345 mean? As you may gather from the symptoms, error P0345 involves the engine; specifically, the Camshaft Position Sensor.

In a working engine, the CMP communicates the speed and position of the camshaft to the Engine Control Module. This data is used by your vehicle to effectively time sparking, thereby igniting the air/fuel mixture in the cylinders; this is why your vehicle may not start as a result of the code. The CMP is also essential to fuel delivery, as it helps the system determine when to trigger fuel injectors.

The CMP communicates with the ECM through voltage patterns. The patterns are created by the camshaft teeth, which block the voltage by passing in front of the electromagnetic sensor. When an error code P0345 occurs, it means the ECM received a voltage pattern that isn’t recognizable.

3. How Serious Is This Issue?

This issue is one of the most serious you can have, as it often interferes with the vehicle’s performance. Worst case scenario, you won’t be able to drive at all.

If your vehicle is diagnosed with this trouble code, you need to get it fixed as soon as possible. Continuing to drive can cause further engine damage, which can cost you in the long run.

4. What Are Some Common Causes?

Due to the presence of complex moving pieces, there are several reasons your vehicle may be diagnosed with a code P0345:

  • Transmission fluid or engine oil clogging the sensor
  • CMP is defective or damaged
  • Timing chain or belt is broken
  • ECM has failed
  • Electronic connections are corroded, damaged or loose
  • Camshaft teeth are broken
  • Bent pins in CMP
  • Shorted, open or burnt CMP circuitry

5. What Are the Possible Solutions?

Since there are so many potential causes, it’s important that you methodically check the CMP. The most common cause is a dirty sensor, so you should evaluate the CMP by removing it. You’ll specifically want to look at the magnetic tip, since this is what creates the voltage pattern. If you see any fluid or oil, clean the part by applying an appropriate solvent and wiping with a clean rag.

If the CMP is clean or cleaning it doesn’t resolve the issue, look over the other parts and wires. Exposure to oil can degrade circuitry, so look for any damaged or loose wiring. Replace corroded wires and tighten any that are loose.

In the event that the problem persists, inspect the camshaft for any broken teeth. If you find damage, the part will need to be replaced. Should you find the camshaft intact, we recommend you take a look at the timing belt, as damage to this part could be the problem.

What if you carefully examine everything and the system appears fine? You may be dealing with a defective sensor. In this case, test the sensor and replace if necessary.

If you’ve tried everything and still can’t find the problem, it may be your ECM. However, this is rarely the reason for this particular code, so investigate other potential causes first.
While an OBD-II scanner error code P0345 problem is serious, it’s not unfixable. By taking your time and testing each component, you can get your vehicle back up and running.

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