Can anyone confirm this is the code for replacing the O2 sensors?

I did a search and could find an answer.

Loren?

 

O2S Sensing Range 1 Cyl. 1-3

 

I wouldnt jump at changing the oxygen sensor yet. That fault is triggered set when your DME is either having to add or subtract fuel past a certain amount. It could be any number of things, from a dirty MAF sensor to a vacuum leak. The only way to know for sure is to look at your TRA and FRA numbers from the DME but I'm not sure if you can do that without an PST2 or PIWIS tester.

Taking it to the dealership may be cheaper than throwing parts at it.

 

are cylinders 1-3 on the right or the left??

 

what is the error code for cylinders 4-6??

 

Take the car out on the road and see if it bogs down at 4000 rpm and seems to lag above that. Its probably a bad MAF. ( I had this twice and it was the Mas AIr Flow sensor each time)

 

Bank 1 is the driver's side.

 

P1124?

 

P1123 - Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Lean Threshold

Fuel/air mixture is so rich that sensing is up to its lean threshold.
Most likely causes:
Fuel pressure too high.
Fuel injector leaking.
EVAP canister purge valve open.

 

thanks for that loren, as always a great help. i removed the aftermarket intake kit as someone recommended looking for vaccuum leaks, i think it may have something to do with the light...i reset it and so far it hasn't come back. Before removing the intake, the light would come back after a reset within a mile of driving, now i've done 50 or so and nothing

could this condition be caused by a "powerchip"?

am i right to assume that only a dealer's scanner is going to tell me exactly where the problem lies?

 

Usually "powerchips" don't cause a CEL. If they did they couldn't sell them.

The dealer's PST2 (or PIWIS) will not tell more than what I told you above. Someone still has to eliminate potential causes... or jump to known (historical) failures.

 

In my opinion, yes.

Actually a PST2 or PIWIS will tell you a ton more than just the fault. If all you needed to diagnose a car was the OBDII fault then dealerships wouldnt be buying PIWIS testers for 5k a pop. It doesnt seem like you've actually used either the PST2 or the PIWIS. If you have you wouldnt make a statement like that.

Seeing the acual values from the DME will tell you a lot. He might be .01 away from setting a fault for bank 2. It would tell you what his range two (FRA #'s) numbers are which could help you by telling you if the problem was just in the idle range or if it carried on through the load range. You would be able to read MAF voltages and airmass numbers plus about a million other things (most of which I have no idea what they are, hehe).

Im not a P21 guru but his fault indicates hes hitting the lean threshold which means to me the computer is taking away fuel. A faulty fuel pressure regulator would be enrichening all cylinders therefore it is likely he would set a fault for both cylinders 1-3 and 4-6. I suppose a leaking fuel injector could cause this fault and this is where the PST2 or PIWIS would help out in looking at your acual values. If he had an evap valve stuck open he would have other faults as the EVAP system does a self test (if certain conditions are met) every time the car is started and sets a fault if it doesnt pass.

Without knowing where is FRAs are it its very difficult to diagnose his problem.

 

With all due respect I have used a PST2... and it will allow you to read a few test points but i does not come up and say change the MAF - which was my point.
And... dealer cost on a PST2 is under $4000 (at least for the dealers I inquired with).

 

I believe I had the same CEL code. Cause was a leaky oil separator bellows...

 

A few test points? Haha ok if by a few you mean like 100. I'm not sure If i get what you mean with "Change the MAF." Sure the testers are not going to come out and say "REPLACE THE MAF SENSOR," in plain english. Thats up to the tech to diagnose. The way to diagnose it is with TRA and FRA numbers, not the ODBII fault code. Without the numbers the fault code, especially this particular fault, is practically useless.

If dealer cost on a tiny screened black and white display PST2 is 4 grand imagine what a PIWIS (Full color, touch screen) is gonna cost.