S52 check engine light problem

[J!m]

I don't know the codes- I use CarSoft and it uses English (sort of) to tell me what's wrong.

When/if the light comes on again, re-scan it and see what codes have recurred. Those, I would say, are 'real'.

[bullmand]

The English version of P0135 is Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 1). That's the only one showing after disconnecting the battery for about 10 minutes and then driving it about 15 minutes. I've contacted the guy that did the swap to find out if he did something the fool the DME so that it wouldn't show the air pump code. If he didn't I'm completely mystified as to why it's not showing me a real air pump code. I would expect to see one of the codes below, but I've got nothing. Thanks for the help so far and if anybody can think of anything else to try I'd love to hear it. I'll definitely keep the thread updated with whatever I find out.

P1413 Secondary Air Injection Pump Relay Control Circuit Signal Low
P1414 Secondary Air Injection System Monitor Circuit High
P1420 Secondary Air Valve Control Circuit Electrical
P1421 Secondary Air System Bank 1
P1422 Secondary Air System Bank 2
P1432 Secondary Air Injection System Incorrect Flow Detected

[J!m]

It is of course possible he had Nick or someone else write out the pump.

If the heater error recurrs (as it sounds as if it does) you are wise to change the sensor. Seems like the pre-cat sensor is the one to blame...

[BMW_Hatchback]

It is also possible he purchased a simulator(s) for the S52 such as AA's, although I hear all they do is hide the CEL, but it might show up on a legit scan like CarSoft or service tech equipment.

I currently don't have a SAP on my M52 swap, and I definitely get a code for it. When I get my CarSoft going I'll tell you what I find. The last time I checked the codes was with the regular OBDII code reader from advanced auto. You can probably check my swap thread for that if I can't dig it up in time

[bullmand]

I'd be really curious to see what your codes are. The car I bought belonged to campaiar so I've been picking his brain about this via email as well. He didn't do anything to work around the absence of the air pump so he thinks this code is being set by the pump not being there. If yours is throwing the same code then he's probably right.

[BMW_Hatchback]

check my swap thread for the codes

[J!m]

It would be highly irrational to get recurring lambda heater errors for a secondary air pump deletion...

There is a code that says "yes, I have an air pump"

And another:"Yes, it is functioning as it should"

And another:"This car came equipped with an air pump"

(and of course the opposite report codes)

I am not familiar with the AA work around... What is that? If the light is out, but the code still there, you still fail.

There is also a code: "bulb out"

so pulling the bulb does nothing (and the scan says the bulb is out on top of the other errors)

If the AA software just keeps the bulb out, it will pass the "bulb OK test" but the error code will still be there... I don't think that really gains you anything, but I am curious to know more about it. (it might work for my Traction Control error throwing the light)

[BMW_Hatchback]

Originally Posted by J!m

It would be highly irrational to get recurring lambda heater errors for a secondary air pump deletion...

There is a code that says "yes, I have an air pump"

And another:"Yes, it is functioning as it should"

And another:"This car came equipped with an air pump"

(and of course the opposite report codes)

I am not familiar with the AA work around... What is that? If the light is out, but the code still there, you still fail.

There is also a code: "bulb out"

so pulling the bulb does nothing (and the scan says the bulb is out on top of the other errors)

If the AA software just keeps the bulb out, it will pass the "bulb OK test" but the error code will still be there... I don't think that really gains you anything, but I am curious to know more about it. (it might work for my Traction Control error throwing the light)

I think the AA Simulator keeps the CEL from being thrown, but a hard (real) diagnostic should still reveal the code. Maybe Johnboy can chime in about SAP sims, I know he's got a whole DIY about them