Does anyone know the check engine codes for a 2002 dodge ram 1500 2dr.
slt truck? My check engine light came on after a recent fuel fill up, i
check the code P1491 emission control at auto zone. I would hate to
take it to the dealer and pay them to tell me i need a new gas cap or
air filter...I also guess i can't reset the code by disconnecting the
positive battery cable. I did a system check inside the truck by
pushing down the trip/odometer button and turning the ignition to the
on position and i received a code that was C CODE 23 97.... any input
would be great thanks...MARS..
according to my 94 - 01 Haynes manual
(says this code applies to 94 - 97)
23 - intake air temp sensor input is out of range (either high or low)
p1491 - a quick google search on this code returned the page below. as I
didn't see that particular code in my Haynes manual. the guy asking the
question also has a 02.
No - the C codes are cluster codes. Remember that the '02 1500's are 3rd
gen trucks, and the instrument cluster runs just about everything in the
cab. This particular code, 23, is a Headlamp switch input circuit open, and
it happened 97 ignition cycles ago (in other words, it's a nuisance code -
The P1491 code indeed refers to the cooling fan relay control circuit.
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