Three years running. when the gas tank sees about 60F, check engine light

[Fless]

There should be a small sticker inside the fuel door that indicates that E85 is allowed.

Since yours is a 2004 and is the L59 engine (based on the "Z" in the VIN) it's Flex, and the fuel cap doesn't HAVE to be yellow. Here's part of my '04's build sheet from GM:

 

[drvrd]

Yes 8th vin number is a Z, but fuel cap is black.

Ps Aurozone code reader only can read the current condition, and cannot read the history of prior codes.

 

[drvrd]

Really appreciate all the help I am getting. The Vehicle saw 42F so of course the check engine came back on. Fuel port door does show an E85 sticker.

PS vehicle came with a shift manipulation software change, OEM code readers cannot get past whatever this software changed. Autozone code reader ended with an error, and miss identified the vehicle as some 1215 chrysler and gave code report was bd2, as coil, sparkwiring and plugs. O'Reilly code reader did see it as GMC but did not not identify the vehicle model but produced a PO135 code(1/2) Stored, image below.

If O'Reily code is correct, clerk mentioned the O2 sensor can be cleaned. Is other then wire brushing needed?

 

[wjburken]

Really appreciate all the help I am getting. The Vehicle saw 42F so of course the check engine came back on. Fuel port door does show an E85 sticker.

PS vehicle came with a shift manipulation software change, OEM code readers cannot get past whatever this software changed. Autozone code reader ended with an error, and miss identified the vehicle as some 1215 chrysler and gave code report was bd2, as coil, sparkwiring and plugs. O'Reilly code reader did see it as GMC but did not not identify the vehicle model but produced a PO135 code(1/2) Stored, image below.

If O'Reily code is correct, clerk mentioned the O2 sensor can be cleaned. Is other then wire brushing needed?

View attachment 269095

I have never heard of anyone cleaning an O2 sensor. If you are going to go through the hassle of removing it from your exhaust pipe to try and clean it, replace it and be done with it.

 

[Fless]

Since the code points to the O2 heater, why not measure the resistance of the heater element in the sensor? Also, is the fuse for the heater good? Getting power all the way to the O2 connector?

 

[drvrd]

Since the code points to the O2 heater, why not measure the resistance of the heater element in the sensor? Also, is the fuse for the heater good? Getting power all the way to the O2 connector?

Burned 1/4 tank check engine light was on, warm engine but ambient air temp. About 55F, bought a STP water capture bottle and chk. eng light went out

 

[wjburken]

PS vehicle came with a shift manipulation software change,

Tell us more about this software change.

 

[drvrd]

Tell us more about this software change.

Code change was done before 2013. So it drove about 4 yrs without this check engine light issue. Will have to chase down the wand if this is important, or interesting otherwise

 

[wjburken]

Code change was done before 2013. So it drove about 4 yrs without this check engine light issue. Will have to chase down the wand if this is important, or interesting otherwise

I only ask as we don’t have an answer to your problem. How long did you own the vehicle before this particular temp related nuance rear it’s ugly head?

 

[drvrd]

I only ask as we don’t have an answer to your problem. How long did you own the vehicle before this particular temp related nuance rear it’s ugly head?

About four years.