check engine light code said replace cam sensor will not crank with new sensor but wiil crank with old sensor

check engine light code said replace cam sensor will not crank with new sensor but wiil crank with old sensor

check engine light code said replace cam sensor . car will not crank with new sensor but when old sensor is put back in it will crank but still has a check engine light.

My car has 11000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :

Hi there:

That is a very off symptom you’re describing. Without being there to phyisicaly inspect your Nissan, the only thing I’d guess that might be causing this is if the cam sensor you installed was the incorrect one, or perhaps the electrical harness created an electrical fault; causing the ignition relay to not send a signal to the starter relay. You might want to have a professional mobile mechanic complete a car is hard to start inspection; so they can determine why you’re having this issue.

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You might not have completed the removal and relearning process of the error code. Your car`s ECU might still be coded with the old camshaft position sensor. Your car`s PCM might be faulty. There may be a faulty starter motor causing the issue.

Unfortunately, there`s no way to reset a camshaft position sensor. If you`re having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you`ll have to replace the part entirely.

In most cases, a faulty camshaft position sensor will cause a vehicle`s check engine light to illuminate. This occurs when one or more timing-related diagnostic trouble codes are logged by a vehicle`s PCM.

Car Will Not Start: Over time, as the camshaft position sensor fails, the signal it sends to the engine control module weakens. When the engine no longer receives the signal, you will not be able to start your car. Engine Misfires: A failing camshaft position sensor can cause your engine to misfire.

NOT PERFORMING A RELEARN PROCESS

In rare cases the engine may misfire or go into “reduced power” or “limp mode” especially under high RPM/load situations Additionally, omission of the relearn process could cause the vehicle to be unable to pass an emissions test due to incomplete or failed misfire monitor.

When replacing a camshaft sensor, there are important steps that should not be overlooked. A crucial step is reprogramming the new sensor using an OBD-II scanner. This step is necessary to clear any error codes that may be stored in the engine controller.

Evidently, you cannot reset a camshaft position sensor. Therefore, you will need to replace the component if your camshaft malfunctions (check engine light on, acceleration issues, sputtering and stalling, etc.).

Error code P0340 indicates a malfunction with the camshaft position sensor A circuit. This type of malfunction can cause serious issues that require immediate repair because the underlying cause of the code could damage your vehicle`s engine if you continue to drive it.

A failing camshaft position sensor begins losing its ability to quickly transfer data. Mismatched fuel delivery and ignition timing, even if off by a few milliseconds, will cause your vehicle to sputter, accelerate poorly, lack power, stall or even shut off.

Bad Sensors

One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.

The most common symptom associated with a bad or failing crankshaft position sensor is difficulty starting the vehicle. The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine.

A bad camshaft position sensor can rarely be repaired and reset (“relearned”); instead, plan on replacing it. Replace a bad sensor by disconnecting the faulty unit, getting a matching replacement, and installing it in the same way.

There are a number of reasons your camshaft sensor might break down: grime and oil in the engine, water damage, bad wiring, and overheating can all cause a camshaft sensor to go bad. The biggest thing to do to avoid this is to take care of your car.

This can cost anywhere from $200 to $400.

The most common failure is the crankshaft position sensor. These fail much more frequently than the cam sensor and will cause a no start. It can also occur if the timing belt broke or jumped a tooth. I would do a compression test also to see if there is low compression.

A P0340 error code indicates a problem with the Camshaft Position Sensor A circuit. It`s possible that the wires leading to the camshaft position sensor are faulty, or that the sensor itself has failed. This error code isn`t a sign of bad camshaft timing.

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