- #Replaced camshaft position sensor but still get code pro
- #Replaced camshaft position sensor but still get code code
That’s not to say that it might not be the sensor itself, but replacing the sensor is not always going to fix the problem. Some vehicle ECUs may be able to use the CKP signal to estimate camshaft position, so the engine will run, but may experience hard starting, rough running, misfiring, or poor acceleration.īecause P0340 and P0345 refer to a circuit problem, do not automatically condemn the CMP sensor.
#Replaced camshaft position sensor but still get code code
What are the symptoms of code P0340?īecause the CMP signal is so critical to ignition and fuel injection, you may experience a no-start or start-stall condition. Before you just jump right on a new sensor, make sure you can rule out the rest of the system, first. Generally, the camshaft position sensor is pretty resilient and long-lived, which doesn’t necessary rule it out as a problem, but most of the time, the problem lies in the wiring and connectors for the sensor, or something else entirely. In turn, this may cause corrosion, open circuits, or short circuits. Older Cars – Over time, plastic and rubber tends to become brittle and less flexible, which can lead to connector breakage and wire insulation damage.Unfortunately, while looking for nesting materials and cleaning house, these little critters might find your wiring offensive or even tasty, resulting in open circuit problems. Cars in Storage – If your car has been in storage for any length of time, rodents may find it a great nesting place.Ford Trucks / Mustang GT – An alternator phase problem, such as a blown diode or open coil, may cause so much electrical interference that the CMP signal gets distorted, causing a P0340 / P0345 DTC to set, among others, in spite of there being no actual problem with the CMP sensor or wiring.If the reluctor ring is rubbing on the sensor, the signal will be distorted. If the sensor is cocked to one side or not firmly seated, the clearance will be wrong and the signal will be too weak for the ECU to detect. Generally, the sensor needs between 0.020” and 0.050” clearance to the reluctor ring or camshaft tooth. Poor Installation – A good CMP signal is highly dependent on placement.Faulty Sensor – If the sensor coil is open or shorted, then it will generate no signal.What are the common causes of code P0340?ĭepending on year, make, and model, DTC P0340 or P0345 may have number of causes. Sensor B codes pertain to the exhaust camshaft. Sensor A indicates that the malfunction is occurring with the camshaft position sensor circuit that pertains to the intake camshaft.
On the other hand, V6 or V8 engines have two banks, Bank 1 and Bank 2, and would therefore have two CMPs, so DTC P0345 would refer to Bank 2. If your engine has only one CMP, such as an inline-four-cylinder, the only CMP code available is for Bank 1, P0340. If the ECU cannot detect a CMP signal, it will set DTC P0340 or DTC P0345 – Camshaft Position Sensor Circuit Malfunction. Of course, the CMP is located on the engine, usually somewhere on the cylinder head, so it transmits CMP data to the ECU using wires. The camshaft position sensor reacts to a toothed wheel on the camshaft, which gives the ECU constant information on its speed and position. If there are two banks on a VVT-equipped engine, then there will be two camshaft position sensors. The two main timing and position sensors used by the ECU are the crankshaft position sensor (often CKP) and camshaft position sensor (often CMP). Depending on engine speed (RPM) and load the engine control unit (ECU) controls the timing and amount of fuel injection, timing of spark ignition, and in the case of engines with variable valve timing (VVT), intake- and exhaust-valve timing adjustments. What are the common causes of code P0340?Ī properly running engine is essentially the precise timing of gasoline-fueled explosions.
#Replaced camshaft position sensor but still get code pro
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