Weird Idle/Engine Codes
#1
Weird Idle/Engine Codes
Hey Guys,
I'm working on my buddy's '94 GT 5.0 and it has developed a strange idle. If you sit w/ it in drive for a minute the engine starts to lope a bit, but it's perfectly fine at all other engine speeds.
Shortly after it started doing this the check engine light started popping on occasionally & then going out. I ran the codes and got a 172 & a 176, which list as 172 (R,M) Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control and 176 (M) Oxygen sensor not switching - system is or was lean Left or Front HO2S - Fuel control
So the computer is showing a lean condition left, right, front, and rear, apparently only occasionally because the light only comes on once in a while when driving.
Can anyone tell me what these codes mean & where I should look for a fix? My buddy needs the car in two days to drive home to see his family for the Holidays!!
Thanks!
I'm working on my buddy's '94 GT 5.0 and it has developed a strange idle. If you sit w/ it in drive for a minute the engine starts to lope a bit, but it's perfectly fine at all other engine speeds.
Shortly after it started doing this the check engine light started popping on occasionally & then going out. I ran the codes and got a 172 & a 176, which list as 172 (R,M) Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control and 176 (M) Oxygen sensor not switching - system is or was lean Left or Front HO2S - Fuel control
So the computer is showing a lean condition left, right, front, and rear, apparently only occasionally because the light only comes on once in a while when driving.
Can anyone tell me what these codes mean & where I should look for a fix? My buddy needs the car in two days to drive home to see his family for the Holidays!!
Thanks!
#2
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mungodrums
S550 2015-2023 Mustang
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09-28-2015 10:54 PM