CM 214 / KOER 538 on '93 4.0 Auto Ranger?

[wrorke]

KOEO = 111
CM = 214
KOER = 538
No "goose" test performed

These indicate a problem with the Cylinder Identification (CID) circuit. My Haynes manual says the Camshaft Position Sensor (CMP) is what is referred to as the CID sensor.

I haven't pulled my intake manifold yet to get a clear view of whats behind it, but looking around it with a mirror, I don't see a Camshaft position sensor. My Haynes manual indicates a '93 4.0 Auto Ranger (California) would not have one.

Does my truck have a Camshaft position sensor? If not, why am I getting these codes? Or do I just need to bite the bullet, pull the manifold and drop $300 on a new Camshaft Position Sensor.

Symptoms:

CEL comes on about 15 sec after start and stays on pretty much continuously. Engine seems to run fine.

I have always gotten a CEL when oil is a quart low (about 3K miles, if I'm procrastinating on the oil change); topping off used to correct the CEL, but not this time -- I added a quart, level is spot on, but I still get CEL.

I am also starting to get CEL after starting downgrade after a climb.
​

160K miles.

Any advice would be appreciated.

Thank you. Happy Thanksgiving.

 

[MrShorty]

If you repeat the KOER test, getting the goose test right, does the 538 go away?

This issue with the CM 214 where Haynes (or any other "generic" EEC-IV code list) kind of falls apart. A 214 does indeed indicate a problem in the CID circuit, but the source of a CID circuit fault depends on year, engine, and maybe whether it is Federal or CA emissions. The best source for the information you require will be professional manual specific to your year. I've found these at libraries (Mitchell or Motor).

Basically, '93 was kidn of a transition year for the 4.0. Some '93's were built as "batch fire" like the '92's (I think these were classed as Federal emissions) and some were built as sequential EFI like the '94's (classed a CA emissions??). "Batch fire" models don't need a CAMP to synchronize the injector firing sequence, so CID is generated by the CKP and the ICM. SEFI models need the CAMP to properly time the injector firing sequence, and so the CAMP generates the CID signal.

Basically, at this point you need enough specific information about your truck so you can get very specific diagnostic information.