Crank sensor 98 chev 4.3

Tiny
PULVERISOR
  • MEMBER
  • 1998 CHEVROLET TRUCK
I've got a 98 chev pickup 2wd 4.3.
It keeps giving me a code 338.
Its now at the point where it almost impossible to drive which is why I'm getting frustrated cause I have checked everything except the wiring, I'm getting the vehicle back tomorrow so I will check for shorts in and connection problems in the circuit to the module and the pcm.

I've tried a new crank sensor, no go.
I normally have distributor problems so I changed that. No go. Normally I get a crankshaft camshaft correlation code when its a distributor problem.

I thought possible timing chain slack cause my cam retard is bouncing around -10 to -11. Which I know isnt right. Should be 0 to -4. Any ideas would be great thank you.
Do you
have the same problem?
Yes
No
Wednesday, August 8th, 2007 AT 6:46 PM

2 Replies

Tiny
RASMATAZ
  • MEMBER
P0338. Crankshaft Position Sensor A Circuit High Input is it getting the voltage reference from PCM?
Was this
answer
helpful?
Yes
No
Saturday, August 11th, 2007 AT 5:32 PM
Tiny
RASMATAZ
  • MEMBER
P0338. Crankshaft Position Sensor A Circuit High Input

The CPS function the same way as the pick-up and trigger wheel in an electronic distributor.

Its purpose is to tell the PCM the position of the crankshaft and the no.1 cylinder to include the engine rpm.

Note: some engines uses a seperate Cam sensor that the PCM uses to determine the correct firing order.

In the event the CPS fails completely the engine will not start and its normally caused by a sensor wiring harness problem
Was this
answer
helpful?
Yes
No
Saturday, August 11th, 2007 AT 5:49 PM

Please login or register to post a reply.

Recommended Guides