fuel temp sensor??? - Chevy and GMC Duramax Diesel Forum

01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 18 (permalink) Old 03-31-2011, 07:21 AM Thread Starter
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fuel temp sensor???

ok i'm geting code p0168 and p0181 and i went to carquest to get a fuel temp sensor bc i thought thats what it was... but they don't list one and neither does gm.. but they show a fuel pressure sensor and a coolant sensor... what ya'll think? it surges on the interstate some and skips when it's cold more than when it's hot i can clear the code and it comes right back... sometimes it willrun better than others but not at specific times....?? i wanna get it fixed today bc i'm off work if i can figure out what to do.

03 CCSB EFI + 5" STRAIGHT PIPE + 33X12.50 18S ON EAGLE ALLOY 197'S + 250K MILES
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post #2 of 18 (permalink) Old 03-31-2011, 07:59 AM Thread Starter
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anybody? bump to the top for some answers

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post #3 of 18 (permalink) Old 03-31-2011, 08:42 AM Thread Starter
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nobody had any problems with this?

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post #4 of 18 (permalink) Old 03-31-2011, 09:06 AM
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If it's surging at idle I'd almost say it's your fpr.. But bump for an answer

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post #5 of 18 (permalink) Old 03-31-2011, 09:22 AM
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I had mine throw a code, but I reset it and rolled on with it and have not had any problems since. My mechanic at the dealership told me he had never replaced one or seen that code, and could not find it in the parts list to even order it.

You should do a search, I have started a big thread about this, and so has one other person. No reason to start this one, just join in on another one already going, you will get more help that way because of the subscriptions already going.

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Oxcart- 01-18-2011, 11:43 PM
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post #6 of 18 (permalink) Old 03-31-2011, 09:43 AM
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yulp same code, still no answers thou. im showing more symtoms then you are thou. i have the ppe race vavle so im doubting the FPR on mine

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4" mbrp dsp5 egr block bf al terrains .
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[/B]
Quote:
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efilive is the easy way out...diehard smokers break out the butt connectors and get shit done
Z
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post #7 of 18 (permalink) Old 03-31-2011, 09:46 AM
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It can also be called a fuel rail temperature sensor I guess. I found this info while searching around...

Fuel Rail Temperature (FRT) sensor
Mounted under the turbocharged air outlet duct, the FRT sensor is a two-wire Negative Temperature Coefficient thermistor that the ECM uses to monitor fuel temperature. Because the fuel passes through a small radiator-style cooler (mounted underneath the cab), check for clogged cooler fins if the fuel temperature climbs too high.


http://www.google.com/search?hl=en&d...509fc152d027c3

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post #8 of 18 (permalink) Old 03-31-2011, 09:50 AM
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Quote:
Originally Posted by DMAXchris View Post
It can also be called a fuel rail temperature sensor I guess. I found this info while searching around...

Fuel Rail Temperature (FRT) sensor
Mounted under the turbocharged air outlet duct, the FRT sensor is a two-wire Negative Temperature Coefficient thermistor that the ECM uses to monitor fuel temperature. Because the fuel passes through a small radiator-style cooler (mounted underneath the cab), check for clogged cooler fins if the fuel temperature climbs too high.
thanks for the info. that gets me looking in one direction...but currently all the symptoms have seized to exist so i cant trouble shoot anymore until they come back...maybe it only happens in cold weather.

2007 chevy lmm LTZ
Z71 midnight blue
4" mbrp dsp5 egr block bf al terrains .
RIP - 05 LLY and Allison 5spd
[/B]
Quote:
Originally Posted by RedBowTies88;6Z28261
efilive is the easy way out...diehard smokers break out the butt connectors and get shit done
Z
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post #9 of 18 (permalink) Old 03-31-2011, 09:51 AM
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I read that it can happen sometimes when using the block heater or grille cover below 0ºF.

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post #10 of 18 (permalink) Old 03-31-2011, 02:05 PM Thread Starter
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Ok thanks my block heater has never ever been used on my truck and is a southern truck so it doesn't get to cold! it acts like a sensor I'm gonna do not searching thanks guys.

03 CCSB EFI + 5" STRAIGHT PIPE + 33X12.50 18S ON EAGLE ALLOY 197'S + 250K MILES
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