Getting error code p0340 on my 2002 Ford Taurus DOHC 3.0

I am getting the error code p0340
Wondering if it is the camshaft position sensor and if this is doable at home.

My car has 111111 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi – yes, you are correct. This error code (P0340) means either the sensor, or the wiring and connectors for this sensor, are malfunctioning. Check the wiring connection for the sensor first, but most likely, the sensor has failed. I recommend a camshaft position sensor replacement by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The P0340 code will be stored in the PCM if the signal between the camshaft position sensor and the PCM is disrupted. This will cause the Check Engine Light to come on. A P0340 error code indicates a problem with the Camshaft Position Sensor A circuit.
The most common cause is a failing or a defective camshaft position sensor. Other problems can include circuit issues, like loose connections or damaged wiring, errors with the PCM, or a damaged reluctor wheel for the camshaft position sensor.
What Does Code P0340 Mean? The OBD-II diagnostic trouble code P0340 indicates a “Camshaft Position Sensor “A” Circuit Malfunction.” It covers the entire circuit attached to the aforementioned sensor, such as the electric wiring and the powertrain control module (PCM).
OBD2 Diagnostic Trouble Code P0340 indicates that the Camshaft Position Sensor `A` Circuit Malfunction in Bank 1 has been detected. The camshaft position sensor (CMP sensor) provides information regarding the rotational speed of the camshaft and where the camshaft is positioned in relationship to the crankshaft.
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.
Engine code P0340 could be caused by a number of things, including a bad sensor, damaged wiring, or a faulty ECM.
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.
Reasons for failure of the camshaft sensor can be: Mechanical damage. Break in the encoder wheel. Internal short circuits.
1.1 Ignition Timing Problems

The ignition timing system can also run into problems. For example, if one or more belt cogs wear out, the PCM will notice that synchronization has failed between the camshaft and crankshaft, and set a P0340 DTC.

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.
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.
No. The catalytic converter just burns fumes from the motor, to help lower the amount of toxic gases coming out. A p0340 is a camshaft position sensor code.
Low battery voltage can contribute to a MIL On condition for P0335 (Crankshaft Position Sensor Circuit) and/or P0340 (Camshaft Position Sensor Circuit) due to inconsistent rotational speed of the engine`s crankshaft.
It controls these systems based on the data it gets from the numerous sensors inside your automobile. When a battery drains, it may send lower voltages of power which may or may not hurt your PCM. But it can definitely cause some problems that are related to your PCM due to it not receiving enough voltage.
Definitely don`t submerge the sensor. Cam/Crank sensors are usually hall-effect magnetic sensors that wear over time due to heat. Cleaning them will not commonly make them work any better.
A camshaft sensor determines the exact position of your engine`s camshaft, helping your car keep your engine`s combustion running smoothly. Many modern engines have one camshaft sensor for each camshaft. This can mean up to four, although some cars will only have two.
Your vehicle should be equipped with four different camshaft position sensors, one for each of the engine`s camshafts. They are mounted in the front of the cylinder heads, near the camshaft actuators, across from each other.
As a camshaft position sensor weakens, the ECM (Engine Control Module) switches off fuel and spark delivery that can be a dangerous situation. If you ignore the symptoms which your camshaft position sensor fails, or any other listed here, eventually your engine will not start.
Failing camshafts can lead to extensive and expensive engine damage which is why they need to be replaced immediately after failure symptoms have been identified.
As the camshaft spins, the lobes open and close the intake and exhaust valves in time with the motion of the piston. It turns out that there is a direct relationship between the shape of the cam lobes and the way the engine performs in different speed ranges.
The camshaft position sensor is a magnetic sensor that monitors camshaft speed to regulate ignition timing and fuel injection timing. It gathers and sends information about the car`s camshaft speed (and as a result the position of each piston) to the car`s electronic control module.
To test a 3 wire crank sensor, you set your multimeter to DC voltage and use it to collect readings from the signal, reference, and ground wires. If the readings you obtain from these are not in coherence with indications contained in the car manual, then your crank sensor is bad.
Cam sensor and Crank sensor are not the same. The Cam sensor is mounted on the Cam shaft and Crank sensor on the crankshaft. Both are used to measure the engine rpm. Typically, the crank sensor is the primary sensor and the cam sensor is the back-up sensor.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Getting error code p0340 on my 2002 Ford Taurus DOHC 3.0
ANSWER : Hi – yes, you are correct. This error code (P0340) means either the sensor, or the wiring and connectors for this sensor, are malfunctioning. Check the wiring connection for the sensor first, but most likely, the sensor has failed. I recommend a camshaft position sensor replacement by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Getting 2 then 4 abs codes, brake shutters, speedo dies and engine slowes when Brake and absolutely lights come on,
ANSWER : You definitely want to start by inspecting the front and rear wheel speed sensors; a failure in these circuits will result in several other problems. Begin by connecting a scanner to see if the Powertrain Control Module (PCM) is registering the sensors accurately. With the scanner, you should be able to monitor all the wheel speed sensors while driving. Keep in mind, the rear wheel speed sensor is mounted on the transmission and is the sensor that runs your speedometer.

Once you determine which sensor is not registering, visually inspect the wiring harnesses and, if everything looks good, replace the sensor. In most cases, the sensor is the problem. If you suspect a wiring problem that isn’t visually apparent, you will need to do a continuity test from the PCM to the sensor connector.

If you determine that all the speed sensors are good, you should suspect a problem with ABS pump. The C0267 trouble code indicates there is a wiring problem in the harness to the ABS pump. It is possible that this is the main problem. To test this, you should disconnect the connector from the ABS pump and visually inspect the pins on both ends. A continuity test should be performed in this harness as well.

There are more test procedures for this that are a bit involved. If you are interested in digging more into this, you should pick up a factory repair manual, not a Chilton. The factory repair manuals are superior and you definitely want good information to make a correct diagnosis of your car.

If you need help with this, I recommend an "ABS light is on" inspection.

Good luck!

I had a p0405 get code replaced egr valve, map sensor,mad sensor, and PCv valve just to be safe but still getting the code why?
ANSWER : The code P0405 and a rough idle is most likely due to carbon getting into the EGR pintle. This will hold the EGR open. When you are getting the rough idle you should shut off engine and remove EGR valve. Check to see if carbon is holding the pintle open. If it is then you will have to remove the carbon from the pintle. Then try and clean out the EGR passages by scrapping them using a round wire brush. Afterwards, start the engine for a few seconds with valve removed to blow out loose carbon. You should then spray a small amount of carbon cleaner into the passages to dissolve the carbon. Lastly, reinstall the EGR and reset the light and codes.

If you’d like assistance with this, consider YourMechanic, as a certified professional can come to the vehicles locations to perform these checks and properly diagnose your Check Engine Light.

Will a ford escape 2002 transmission fit into a ford explorer 2002? (Not 4×4)
ANSWER : No, they are completely different. An Escape is a front wheel drive platform, an Explorer is a rear wheel drive platform. There are two options for a front wheel drive Escape. If your production date is before 11/18/01, and 11/19/01 and after for the 2002 model year. The only other compatible vehicle is the Mazda Tribute. A great resource I use is Car-Part.com. It has interchange information built in, and only displays parts that will work.

The TPS error code P0123 appears only when the AC is on
ANSWER : Hello. The low charge in the A/C system is going to cause the A/C compressor to work harder than it should. This will put a greater load on the engine and may cause your throttle position sensor to give a bad reading. Have a certified technician set the A/C system to the proper levels and see if the P0123 code continues. Having the throttle body cleaned may also help fix this problem. If you need help with this, a certified technician from YourMechanic can come to your car’s location to diagnose the code more thoroughly in order to have this corrected.

I went to check fluids on my 2002 Ford Taurus and got to the radiator overflow opened it and it has black like oil inside of it I 2002 Ford Taurus
ANSWER : Hello – check the oil pressure with an actual gauge. The oil pressure switch that controls that warning comes on when oil pressure drops to about 5 psi – a dangerously low pressure reading for your engines health. I also recommend a engine inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs. It is likely you have a blown head gasket, and oil is leaking into the coolant system.

Getting error codes P0340 and P0011
ANSWER : These codes both indicate a problem with the cam sensor for bank 1, or A, on the passenger’s side of the engine. Whether the sensor has failed and no other problems exist would need to be verified. I would recommend to replace both bank 1 and 2 sensors as a pair, since they are the same age, and the other may fail within a short period of time. I recommend that you have a mechanic, like the ones from YourMechanic, come by and check your car to verify whether your camshaft position sensor requires replacement.

Check Engine Light codes. 2006 Mercedes Benz E55 AMG
ANSWER : Since you are getting many different codes from different areas of the engine, you may need to have the system hooked up to a factory scanner since most of these generic codes do not cross over in my repair software. I would also check with the local dealer to see if any service campaigns are open on the vehicle since there are over 30 possible campaigns that could pertain to this vehicle and some of the problems you are having with the secondary air system. This may be the cause of some of the codes and supercharger disabling. If you’d like to have this checked elsewhere, a qualified pro from YourMechanic can come to your car’s location to go through each Check Engine Light code firsthand and have them resolved.