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check engine lite

mabryoso1
Explorer
Explorer
Have a 2005 32v southwind chevy 8.1 engine . the check engine light came on while on a trip. The code was a knock sensor left bank drove
with it on till needed to fill up with fuel. After filling up and about a 45 minutes later the lite went out...we were on a trip and after a week and on the way back lite came on again and same thing happen again stop for fuel and down the road about 45 minutes or so lite went out and remained off . someone suggested the fuel cap could cause this. code again was a knock sensor which was replaced 4 years ago.....

Your
imput appreciated... Mabry
3 REPLIES 3

newman_fulltime
Explorer
Explorer
chances are moisture in the tank sends a bubble up into a cylinder get some lucas fuel treatment run it see if it clears up

ArchHoagland
Explorer
Explorer
Do you know the actual code?

And how did you read the code?
2004 Monaco La Palma 36DBD
Workhorse W22 8.1 Gas Allison 1000, 7.1 mpg

2000 LEXUS RX300 FWD 22MPG 4020 LBS
US Gear Brakes

enblethen
Nomad
Nomad
I doubt the fuel camp would cause knock sensor code.
I would say dirty combustion chambers or possibly fuel filter.
I would get some Chevron Techrolene(sp). Put enough in according to bottle(s). This should or has in my case cleaned the injectors, valves and plugs.
Next item would be a bad or failing coil pack.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker