michobebe

Hi guys my M156 has had the following problems since I got it:
I'm experiencing ALLL of the camshaft codes, sooner or later after erasing them and driving the car hard enough: P0012, p0014, p0016, p0021, p0024 , {it also has a purge valve code too p0444 (will be changed soon)}.

At idle: "Ignition angle"@ is hovering around 12-14°/12-14° Left/Right, so within specs. I don't know what would be the correct values under load, but my "Ignition angle" max out around 32-35° for both sides under medium load.

As for the "Camshaft position sensor" :
Intake reading is at (28, 28) and exhaust "Camshaft position sensor" reading at idle (-15, -15), so they are perfectly good and within specs (meaning timing is correct).

Now, here's the question mark:
Under load, intake camshaft position sensor DOES NOT CHANGE AT ALL (or tiny bit) and STAYS at 28/28° left and right.
meanwhile exhaust camshaft position sensor changes from -15/-15 to +28/28 in a fraction of a second at exactly 1000rpm giving the car a jerk. Then the exhaust position value stays up there at +28/28 all over the rpm rang no matter the load, it only goes back down under 1000rpm down to the normal idle rpm. If I keep the car at exactly 1000rpm it will repeatedly jump and jerk and have the exhaust position switch between -15 and 28.

So to sum up:

Idle
intake 28/28
Exhaust -15/-15

Under load (over 1000rpm)
Intake 28/28
Exhaust 28/28

Could any of you please check or if they know how their camshaft position sensors act on their own good working car tell me more about it and help me figure out my problem?

Thank You!!

TampaxVortex

A year later, if you still come on here, did you ever figure out your issues?

roadtalontsi

Im going to go with someone timed the engine wrong.