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Old 01-16-2007, 10:33 AM   #1 (permalink)
tmg115
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code P0181

my truck has just set a code P0181 i scaned it and it says it was a fuel temp sensor code. i cant find any info on this code or sensor. can you guys help. does anyone know what the problem is or what the fix might be. or even where the sensor is?

Thanks
Tom
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Old 01-16-2007, 05:57 PM   #2 (permalink)
jimsbcs
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I get that code when it's very cold out side -20 or cooler after I've backed pickup out of warm garage. Happens 3-4 times a year since new. Clear it and forget about it. First time it happened I had dealer look at it and they cleared it and said it was no big deal.
Opps after seeing your avator I see you are in Texas so can't blame that on the cold.?
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Old 01-16-2007, 06:03 PM   #3 (permalink)
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try this

Service Engine Soon Lamp Illuminated, False DTCs P0181 and/or P0116 (Reprogram ECM) #02-06-04-058 - (12/16/2002)

or

Subject: LBZ, LB7, LLY, Service Engine Soon (SES) Light Illuminated, DTC P0116, P0181 Set with Engine Coolant Heater Usage in Ambient Temps Above -18 Degrees C (0 Degrees F) (Replace Engine Coolant Heater Cord #06-06-04-027 - (04/27/2006)



Models: 2001-2006 Chevrolet Silverado

2006 Chevrolet Express Vans

2001-2006 GMC Sierra

2006 GMC Savana Vans

with 6.6L Duramax™ Diesel V8 Engine (VINs D, 1, 2 -- RPOs LBZ, LB7, LLY)




--------------------------------------------------------------------------------

Condition
Some customers may comment on a Duramax™ Diesel vehicle with a Service Engine Soon (SES) light illuminated on the instrument cluster. Some vehicles may have been previously serviced for this same condition. Technicians may also find the following DTCs set with no concern found.

• DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance

• DTC P0181: Fuel Temperature Sensor Performance

Cause
The Fuel Temperature Sensor, Engine Coolant Temperature (ECT), and Intake Air Temperature (IAT) sensors are compared to each other during a cold start to identify a concern with any one of the sensors. Engine coolant heater usage in ambient temperatures above -18°C (0° F) may trigger a false DTC P0116 or P0181.

Correction
The diesel supplement to the Owner’s Manual advises that the engine coolant heater may be used below -18°C (0°F) to assist with cold starts. However, a customer may wish to plug in the heater when the overnight temperatures are unknown. A thermostatically controlled engine coolant heater cord is available for the prevention of false DTCs. This cord incorporates a thermostatic switch that only conducts below -18°C (0°F).

Follow the steps below for the particular model year vehicle you are working on to ensure that the correct diagnostics are performed before replacing the engine coolant heater cord.

2001-2002 Vehicles
Verify that the updated calibration per Corporate Bulletin Number 02-06-04-058 has been installed.
Follow the published diagnostics in SI.
If no concern is found, determine if the customer is using the engine coolant heater above -18°C (0°F).
If the customer is using the engine coolant heater in ambient temperatures above -18°C (0°F), then replace the original coolant heater cord with the thermostatically controlled engine coolant heater cord, GM P/N 10369173.
2003-2006 Vehicles
Verify that the latest calibration has been installed.
Follow the published diagnostics in SI.
If no concern is found, determine if the customer is using the engine coolant heater above -18°C (0°F).
If the customer is using the engine coolant heater in ambient temperatures above -18°C (0°F), then replace the original coolant heater cord with the thermostatically controlled engine coolant heater cord, P/N 10369173.
Parts Information
Part Number
Description

part# 10369173
Cord, Engine Coolant Heater
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Old 01-16-2007, 06:19 PM   #4 (permalink)
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I just threw that same code this morning on the way to work and once I got to work and read the code, I cleared it. On the way home all was good to go, no more codes. I normally use the block heater at temps 0'c (32'F) or below to warm that big block up for better oil circulation on a chilly morning. I think I shall stop doing this. BTW, thanx for the great info, mvnvltn........................SWH...
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Old 01-16-2007, 07:21 PM   #5 (permalink)
tmg115
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well ok guys thanks for the help. but i type of crap is this, i cant use my block heater unless it is under 0.F? i like getting into a truck with instant heat not one that takes 10min to heat up. oh well thanks for the help guys.
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Old 01-17-2007, 08:30 PM   #6 (permalink)
jimsbcs
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Great info, but I'm still going to plug it in any time I want. I don't care what any body sayes, starting a cold diesel is hard on it.
By the way I've gotten that code while driving down the road hours after I've started it up? (Only when -20 or colder though) I understand from reading other posts that on the newer D-maxs it will, or could, put your vehicle into a limp mode, but on my 02' it affects nothing. Which is my I'm not worried about it. Jim
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06' Chevrolet 3500 Crew Cab Dually Red 4x4
US Gear D-celerator exhaust brake
Ranch Hand grillgaurd bumper combo
09' Bobcat S220
11' Bobcat E50 trackhoe
92' Autocar snowplow dumptruck Orange
72' Chevrolet 1/2 T 4x4 pick-up Orange&White LP Gas
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