Still Learning

Fernando Technician Texas Posted   Latest   Edited  
Unsolved
Driveability
2014 Hyundai Tucson GLS 2.4L (G) 6-spd (A6MF2-1) — KM8JUCAG8EU930262
P0016 — Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor A
MIL On

I've got this Hyundai Tucson from Auction that is eating my lunch and I am a bit confused. the engine idles fine and responds somebody did a bunch of work to the engine including trimming kit with phasers (at least looks that way) I removed the valve cover and checked for aligned trimming marks alignment, vvt oil valves for clogging and operation. it all checks out. scoped crank and intake cam sensor but I noticed that the “missing tooth” is down opposite to Hyundai's sample where it goes to 5 volts I didn't "invert' the wave from on the verus so that it has me a bit confused any thoughts on this? anybody? thanks in advance

0
Jesse Owner/Technician
Georgia
Jesse
 

Might be a magnetized crank trigger inverting the signal? The sensor could be inverting the signal as well, depends on what style it is? Make sure the grounds are in the correct place and clean.

+1
Ð Awarded
Agree
Fernando Technician
Texas
Fernando
 

Yes you make a great point Bernie Thompson has a couple of videos with magnetized camshafts… this signal though is on the crank shaft… it is worth a try… thanks will keep you posted

+1
Ð Awarded
Dmitriy Analyst
Ontario
Dmitriy
 

Thanks for including the picture of the trigger wheel — it shows not the missing tooth, but one long tooth. Typically, presence of a tooth makes the sensor pull signal low, so I would expect the “verus picture“ from such a trigger wheel, not the “Hyundai’s sample”. Also the fact that it idles fine makes me think the ECM is OK with the “verus picture“ CKP signal, but, of course, can not be…

0
Ð Awarded
Stephen Technician
Tennessee
Stephen
 

I see what you are saying about the missing tooth being a long tooth but the higher “bumps” at each end of the tooth have me wondering. How much gap, wheel to sensor, is needed for the sensor to change state?

0
Ð Awarded
Stephen Owner/Technician
California
Stephen
 

Not sure if this pertains to your situation, but often the camshaft gear pin shears and causes the cam to shift. This is common on the V6 engines. The theory is the high pressure fuel pump may start to drag, and sheer the pin

+1
Ð Awarded
Agree
John Mechanic
Tennessee
John
 

Yes a lot of the Hyundai cam sprocket pins do shear will have you scratching your head for a few

0
Ð Awarded
Alex Diagnostician
Australia
Alex
 

We need Ray Yergeau with a known good !!😉

0
Ð Awarded