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P0340 Trouble Code - Camshaft Position Sensor Circuit Malfunction
My Ultra gauge reports a P0340. I looked it up, translates to "Camshaft Position Sensor Circuit Malfunction" but I'm not sure what to do.
It started to show after a ~100mile trip. Before the trip I replenished coolant and oil. I think I accidentally overfilled the oil slightly, the oil dipper rod shows about a thumb above max. Not sure if there could be a relation? No clue.
Truck drives absolutely normal - no other codes, starts fine, no power loss.
Any ideas?
Thanks Jacques
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Land Rover Disco 2 HSE 7, 2004, 50,000 miles
Oil pool overfill if in contact with crankshaft as it rotates would not be desired. With most Rovers this will take care of itself automatically every night (lol). But you might want to drain out a bit before replacing a $300 sensor.
That would be the Cam Position Sensor, announcing that it is no longer changing from "low" to "high" volts every revolution of the cam shaft. This is not the Crank Position Sensor (that's on the back of the engine). This one is on the front cover of the engine, see attached pix, behind the belt and pulleys. Has a connector that can be wiggled. Note that it unnatural for a Rover engine to be this clean...
The cam position sensor code can be cleared but may come back in two drive cycles.
Expensive as far as sensors go. Would check connection first. Most likely has O ring behind it as it is in the front cover, held by one bolt. The nose of the sensor is very close to the timing gears and reacts to the four slots milled in the gear.
The ECU has a plan "B" if this sensor fails, so that is why your are still running.
The cam shaft sensor is located on the passenger front on the front cover seal, pretty high up. It is possible it has failed, but I would check the electrical connection to make sure there is no contamination which could show a malfunction code instead of the other either high or low output signal codes that could have come up.
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Mike
Retired service manager. Member of the Solihull Society, NCLR club, SCLR and Santa Barbara 4 Wheelers.
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Thanks again, I promised an update: The error code just went away. Not sure if that is related to the oil level which has gone back to normal by LR magic
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Land Rover Disco 2 HSE 7, 2004, 50,000 miles
Thanks again, I promised an update: The error code just went away. Not sure if that is related to the oil level which has gone back to normal by LR magic
Happened to me as well. One week the code was there, the next it wasn't. Come to think of it, I think I over-serviced the oil during the last change... the dipstick finally reads "FULL" now, and the code is gone. Magic!
P0340 Trouble Code - Camshaft Position Sensor Circuit Malfunction
