I have a VAG-COM readout w/ engine codes. Can you help me diagnose the codes?

**mydreamcar** · 04-25-2016 12:28 PM

So many codes. Don't know where to begin. Audi s4 2001 (.5?) has 171,000 miles. Mechanic replaced all o2 sensors last year. I work on my own car, except when I can't.
Thanks a ton in advance.

7 Faults Found:
17861 – Exhaust Gas Temp Sensor 1 (G235)
P1453 – 35-00 — Open or Short to Plus
17866 – Exhaust Gas Temp Sensor 2 (G236)
P1458 – 35–00 – Short to Ground
17584 – Bank1: O2 (Lambda) Correction Behind Catalyst
P1176 – 35–00 – Control Limit Reached
17585 - Bank2: O2 (Lambda) Correction Behind Catalyst
P1177 – 35–00 – Control Limit Reached
18032 – MIL Request Signal Active (Check TCM for errors too !)
P1624 – 35–00 –
17869 – Exhaust Gas Temp Regulation for Bank 1
P1461 – 35-10 – Implausible Signal — Intermittent
17868 – Exhaust Gas Temp Regulation for Bank 2
P1460 – 35–00 – Limit Reached
Readiness : 0000 0000

**vavJETTAw36** · 04-25-2016 12:58 PM

Check your egt/oxygen sensor wiring around the exhaust

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**vavJETTAw36** · 04-25-2016 01:15 PM

Also, did you reset the codes first? Some of these could have been months or years ago.

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**zillarob** · 04-25-2016 01:29 PM

Egts will hold you at wg psi and I think make you run rich.

Check the tcm for whatever code it is throwing. If torque conv code is a dirty beatch if that is what it is.

**mydreamcar** · 04-25-2016 04:09 PM

Originally Posted by vavJETTAw36

Also, did you reset the codes first? Some of these could have been months or years ago.

I reset them with my cheapo OBDII Scanner, but I can try again and try a re-scan on the VAG-COM

**mydreamcar** · 04-25-2016 04:12 PM

Originally Posted by zillarob

Egts will hold you at wg psi and I think make you run rich.

Check the tcm for whatever code it is throwing. If torque conv code is a dirty beatch if that is what it is.

Thanks.
What is "wg" stand for?

TCM (transmission control module?) code also has been, and reads, P0741: 35-10 Stuck OFF/No Power Being Transferred" for many years. That's another issue I may or may never deal with due to the complexity/PITA factor.

**mydreamcar** · 04-25-2016 04:13 PM

Originally Posted by vavJETTAw36

Check your egt/oxygen sensor wiring around the exhaust

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Could you please explain that in a little more detail, as in, what am I looking for? And where do I look? After the second set of cats, between the cats, or before the cats? And what side?
Thanks.

**zillarob** · 04-25-2016 05:54 PM

You can get yourself into a lot of trouble real quick with these cars if you dont know exactly what you are doing.
They really arent the best to learn on so I recommend you get somebody that has exp with these nightmares to take a look at it.

Wg is waste gate, you are in limp mode.

On that tranny code, how are you getting through ca emissions with a cel?

**mydreamcar** · 04-25-2016 07:39 PM

Thanks for the tip. I know what my limits are and I'm not learning from scratch. I come here to learn from more experienced people so I can increase my skill set and rely on myself more and more. I've worked on this car for 9 years. I'm very grateful for everyone sharing their hard earned knowledge. Getting by by resetting the code and driving for 50 miles at 55 mph so it doesn't trip the CEL. Then I go in and get it smogged. It's a trick I learned while I chip away at these problems.

**vavJETTAw36** · 04-25-2016 08:02 PM

Originally Posted by mydreamcar

Could you please explain that in a little more detail, as in, what am I looking for? And where do I look? After the second set of cats, between the cats, or before the cats? And what side?
Thanks.

The wiring is on the PS firewall behind the accordion and on the DS behind the coolant res. The wiring goes down close to the downpipes. Check back there and make sure no wires are touching/melted. If not, maybe you have 2 bad EGTs and 2 bad oxygen sensors.

**mydreamcar** · 04-25-2016 08:55 PM

Originally Posted by vavJETTAw36

The wiring is on the PS firewall behind the accordion and on the DS behind the coolant res. The wiring goes down close to the downpipes. Check back there and make sure no wires are touching/melted. If not, maybe you have 2 bad EGTs and 2 bad oxygen sensors.

Thank you. I will have a look. As noted, the O2's were replaced 1 year ago... though, I *think* the O2 plugs had to be altered in order to fit. I'll google where the EGTs are on this car.