Last post on Jun 25, 2013 at 7:07 PM
You are in the Chevrolet S-10 & GMC S15 Sonoma
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Chevrolet S-10, Auto Repair, Truck
#1 of 95 Trouble Codes PO178 AND PO179
Feb 12, 2007 (1:26 am)
These codes are Fuel Composition Sensor Circiut #178 Says Low input and #179 says High input. The dealership says i need to replace Fuel sensor ,part will cost $677.00 and also replace fuel pump inside of gas tank upon which they want to drop and clean out because of some smut that might be in the tank due to sensor breaking apart!!! this will only cost me $1500.00, This is crazy Please can someone help me????
#2 of 95 Re: Trouble Codes PO178 AND PO179 [km59]
Mar 08, 2007 (12:46 am)
I fixed the problem by buying the part at my local salvage yard, the part cost me $10.00,I replaced the Flex Fuel Composition Sensor and the MIL light cleared and OBD Fault codes cleared. No need for all that money the dealership wanted from my wallet!!!! Do it yourself in 1HR and feel very good about not giving in to the Money Grabbers.
#3 of 95 dtc codes
Mar 25, 2007 (5:51 am)
#4 of 95 dtc codes
Mar 24, 2007 (12:35 pm)
Hello, this is my first post here. I have an 02 Sonoma 2wd 4.3 auto. Last year, leaving Ontario we ran into a blizzard with lots of wet snow and salty roads. The check engine light came on and stayed on until we got to NC and stopped overnight. The next morning the light was out and stayed out all the way to Florida for Bikeweek. On the way home it came on during a rainstorm and then went out when it got dry again and never re-appeared.
Until...last week after a wet and salty snowstorm the check engine light came on and the truck idled a little rough. My neighbour put his code scanner on it and we got a P0300 and P0131 code. P0300 os "random misfire" and P0131 is "Bank 1 sensor 1 low voltage". I changed the driver's side front O2 sensor, intalled a new cap and rotor and spark plugs and cleared the codes. The truck ran perfectly for one day and then the Check engine light came back on and the truck started running roughly. I checked the codes again and the P0300 code is set with a second P0300 pending.
I read that the EGR valve can stick and cause these problems. Here's the dumb question...Where is the EGR valve? I have ordered a service manual but it's not here yet.
#5 of 95 Re: dtc codes [redlow]
Mar 25, 2007 (5:51 am)
I would suspect ignition wires. EGR valve location will be found in the owner manual, shows a under the hood picture and legend.
#6 of 95 S10/S15/Sonoma: Warning lights and trouble codes
May 28, 2007 (4:01 pm)
#7 of 95 service engine lite..fuel composition circuit high input
May 31, 2006 (2:49 pm)
my truck keeps tripping the code P0179...fuel composition circuit high output is the explaination, I can clear this and it comes back after driving a mile or 2, any hints on how to remedy this,
#8 of 95 service engine light Mitusbhi Gallant 2001 code 135
Jul 12, 2006 (12:15 pm)
How do you turn light off after replacement of oxygen sensor
#9 of 95 Re: service engine light Mitusbhi Gallant 2001 code 135 [ddavid]
by KCRam@Edmunds HOST
Jul 12, 2006 (3:05 pm)
This is the Chevy S10/GMC S15-Sonoma discussion, so you probably want to ask in our Mitsubishi Galant discussion.
kcram - Pickups Host
#10 of 95 Re: service engine light Mitusbhi Gallant 2001 code 135 [ddavid]
Jul 12, 2006 (5:11 pm)
I drive a S-10 and my wide drives a 02 gallant. Her light came on the other day because of the o2 sensor and I cleared it with the reader I used to detect the cause. I guess the question I would have is how did you know that the o2 sensor is what caused it to come on? Last spring her light came on and it was caused by not having the gas cap on tight. Good Luck.