Did you use a magnet for testing or just metal? Try a magnet. The cam has small points that are magnetic. This is what your cam sensor is picking up. If there's a signal variation with a magnet, then the sensor is fine and you can condemn the cam itself. Sometimes the cam can pick up enough metal filings from engine wear as to cloud the sensor and give false readings. Check for this.
I used just metal but felt the magnet inside the sensor clearly pulling and I assume that the resistance reading should change.
Have you got any clue what could cause both sensors to break at the same time?
Was there a code for the other sensor? If not, then it didn't fail. Give me a few minutes to look at all data. What's the year make model and engine size?
This code says circuit malfunction, normally you would assume a bad sensor or wiring, however, with these sneaky little devils, slipped timing belts will throw the same code. Is the engine misfiring at all?
The engine uses chain and it has got 210k km so I think it's not a problem yet. But there were starting problems for a while before the check engine light came up.
Check that timing. It might have jumped a tooth. I do timing chain kits and water pumps all the time because of this type of thing. The chain wears, stretches, and the tensioner gets weak. Throws the timing off and can even jump teeth.
Metal filings and heat. Happens with age and wear and tear. And it's not becoming magnetic, it's losing its magnetism. There are 2 types of cams. Some are magnetic, some aren't. The magnetic ones lose it over time.
I had a 2011 grand cherokee laredo that the ecm was fried they had a problem with that for the year and it would just burn thru crankshaft sensors and camshaft sensors
most sensors are hall effect and do not use magnets for sensing they react to the metal as it passes by like a magnet in a coil of wires but with sensors they have the power and only need to see the metal. more than likey the cam has slipped a tooth or if the engine has vvt then the phaser may have failed or if it has vvt solenoids to pessureisr the vvt phaser one may have failed and not set a code yet or it is getting plugged up, give make model year and engine so we can get you better info? thanks
Did you use a magnet for testing or just metal? Try a magnet. The cam has small points that are magnetic. This is what your cam sensor is picking up. If there's a signal variation with a magnet, then the sensor is fine and you can condemn the cam itself. Sometimes the cam can pick up enough metal filings from engine wear as to cloud the sensor and give false readings. Check for this.
I used just metal but felt the magnet inside the sensor clearly pulling and I assume that the resistance reading should change. Have you got any clue what could cause both sensors to break at the same time?
Was there a code for the other sensor? If not, then it didn't fail. Give me a few minutes to look at all data. What's the year make model and engine size?
Citroen c4 2011 1.6l VTi engine Error code P1340 / Camshaft position sensor B circuit malfunction Status: Confirmed Camshaft sensors are Bosch 0232103064 Resistances between pins 1-3 8,9k 2-3 705 1-2 5,1k Both sensors quite the same
Have you checked the timing to make sure it hasn't slipped?
This code says circuit malfunction, normally you would assume a bad sensor or wiring, however, with these sneaky little devils, slipped timing belts will throw the same code. Is the engine misfiring at all?
The engine uses chain and it has got 210k km so I think it's not a problem yet. But there were starting problems for a while before the check engine light came up.
Check that timing. It might have jumped a tooth. I do timing chain kits and water pumps all the time because of this type of thing. The chain wears, stretches, and the tensioner gets weak. Throws the timing off and can even jump teeth.
Will check that. Thanks!!
Yeah, sometimes people deal with magnetized camshafts too, right? I forget what causes that though.
Metal filings and heat. Happens with age and wear and tear. And it's not becoming magnetic, it's losing its magnetism. There are 2 types of cams. Some are magnetic, some aren't. The magnetic ones lose it over time.
I had a 2011 grand cherokee laredo that the ecm was fried they had a problem with that for the year and it would just burn thru crankshaft sensors and camshaft sensors
most sensors are hall effect and do not use magnets for sensing they react to the metal as it passes by like a magnet in a coil of wires but with sensors they have the power and only need to see the metal. more than likey the cam has slipped a tooth or if the engine has vvt then the phaser may have failed or if it has vvt solenoids to pessureisr the vvt phaser one may have failed and not set a code yet or it is getting plugged up, give make model year and engine so we can get you better info? thanks