P1126 and P1133 clarification pls

[wawaboxster]

Hello

While repairing some parts to repair the boxster, its feels like we are finding more problems!

Now the new CEL I have are P1126 and P1133. Car is a Boxster S 2000 with 154 000km.

MAF is new and tested by mechanic.

No intake vacuum (its been repair and smoke test)

No more exhaust leek, its been repair.

AOS is about 2 mouths old.

So Indy says its probably an oxygen sensor, wirring or DME.

I'm 300km from him, can I do some test before going back to see him? With these code, which oxygen sensor might be faulty.

What do these codes tell you?

Thanks

Chris

[Loren]

How does the car run?

Does it idle properly?

Any acceleration problems? or cruising (steady throttle)?

[wawaboxster]

Idle is fine

Accelaration is sluggish, feel a little anemic

But other than that, its all good.

Chris

Forgot to say, Indy says its probably an oxygen sensor that is getting tired or the heating of the oxygen sensor getting week.

Edited July 21, 2013 by wawaboxster

[JFP in PA]

Hello

While repairing some parts to repair the boxster, its feels like we are finding more problems!

Now the new CEL I have are P1126 and P1133. Car is a Boxster S 2000 with 154 000km.

MAF is new and tested by mechanic.

No intake vacuum (its been repair and smoke test)

No more exhaust leek, its been repair.

AOS is about 2 mouths old.

So Indy says its probably an oxygen sensor, wirring or DME.

I'm 300km from him, can I do some test before going back to see him? With these code, which oxygen sensor might be faulty.

What do these codes tell you?

Thanks

Chris

They would indicate either a vacuum leak or low fuel pressure/volume. Both banks have reached their enrichment limits, so the car is lean on both sides. This is not a MAF issue, and it is probably not an O2 sensor getting weak as both banks are lean.

I would start with a fuel pressure and delivery test to eliminate fuel delivery as an issue; if they are OK, you have an intake vacuum leak somewhere in the system........

[Loren]

Well that would be easy to see on a O2 sensor graph of both banks before and after the cats.

It is probably worth taking the time to measure the fuel pump output too.

[wawaboxster]

Humm fuel filter and fuel pump have been change lately.

I just read that a blown AOS that leave a lots of oïl in the intake could damage the oxygen sensor.

When My AOS broke about 2 mouths ago, there was a huge smoke screen and lots of oïl in the intake. Its been clean as good as possible. Could it be?

To see O2 sensor graph, I guest I would need something like a durametric cable or a PIWIS?

[JFP in PA]

Humm fuel filter and fuel pump have been change lately.

I just read that a blown AOS that leave a lots of oïl in the intake could damage the oxygen sensor.

When My AOS broke about 2 mouths ago, there was a huge smoke screen and lots of oïl in the intake. Its been clean as good as possible. Could it be?

To see O2 sensor graph, I guest I would need something like a durametric cable or a PIWIS?

Oil from an AOS failure will not make both side of the engine read lean. Yes, you need either the Durametric system of one of Porsche's (PIWIS or PST II) to read the sensors, and you could also read the fuel trim data as well.

That said, to check the fuel system, you only need a fuel pressure test gauge and about 10 min.