CEL p1131, o2 sensor
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Joined: Jun 2011
Posts: 2
CEL p1131, o2 sensor
First of all, my car is a 2000 s4, 158k miles.
So I had a check engine light come up, then it went away after sitting for a day. I ran it by a friend and he said it was probably just a false alarm and it was nothing to worry about. Three weeks later the CEL comes back on but stays on for a few days, so I take it to this friend and he hooks his scanner up, and pushes out CEL p1131.
My mechanic comes over to take a quick look before replacing the o2 sensor, and says that there's nothing wrong with the o2 sensor and hooks up his "Audi/VW Scanner" and it returns a code saying that the "Turbo/Supercharger limit blah blah blah has been exceeded" Then he pulls out an infared thermometer and checks all of my fuel injectors and says that I need to have all of my injectors flushed at $69 a pop.
Excuse my ignorance here, I'm not great at all with cars, so I ran this by two people that I know and they both called bullshit. They both said if he was able to diagnose dirty injectors, run a bottle of STP fuel injector cleaner in it, and if my CEL comes back on and pops a p1131 to replace the o2 sensor.
My mechanic also says it's a "common" problem and the injectors should be flushed every 30-40k. He also pointed to which ones are performing bad, so I asked if I should just flush those two, and he said that they should all be done at the same time.
So I had a check engine light come up, then it went away after sitting for a day. I ran it by a friend and he said it was probably just a false alarm and it was nothing to worry about. Three weeks later the CEL comes back on but stays on for a few days, so I take it to this friend and he hooks his scanner up, and pushes out CEL p1131.
My mechanic comes over to take a quick look before replacing the o2 sensor, and says that there's nothing wrong with the o2 sensor and hooks up his "Audi/VW Scanner" and it returns a code saying that the "Turbo/Supercharger limit blah blah blah has been exceeded" Then he pulls out an infared thermometer and checks all of my fuel injectors and says that I need to have all of my injectors flushed at $69 a pop.
Excuse my ignorance here, I'm not great at all with cars, so I ran this by two people that I know and they both called bullshit. They both said if he was able to diagnose dirty injectors, run a bottle of STP fuel injector cleaner in it, and if my CEL comes back on and pops a p1131 to replace the o2 sensor.
My mechanic also says it's a "common" problem and the injectors should be flushed every 30-40k. He also pointed to which ones are performing bad, so I asked if I should just flush those two, and he said that they should all be done at the same time.
Administrator
Joined: Jul 2006
Posts: 11,670
From: Binghamton, NY
P1131 is an open sensor (internal resistance too high). That means that the sensor has opened up and isn't functioning. I'm gonna venture a guess that this guy doesn't specialize in Audi...
Change the sensor.
Change the sensor.
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