Brig993

So I'm throwing the attached fault codes with a check engine light and I cannot pass state emissions inspection. I read the codes from my durametric. Codes are 2, 32, 34. The voltage codes I understand and I just replaced my battery and checked the alternator output. After I cleared all the codes the voltage did not come back but the others did after a long drive. Attached is the durametric readout.

pp000830

First, check you system voltage as between 13.5 & 14.5. with the engine running. Low voltage can cause all sorts of codes.

I'm guessing a little but you have an idle code that could be influencing the Oxygen sensing range code. Is your car idling at the proper RPM? Is your throttle fully closing when your foot is off the gas. Do you have any large vacuum leaks? On a Varioram engine check the actuator on the duct that leads to the big cabin fan motor on the driver side in the engine compartment. Most have a failed (leaking) diaphragm by now if original and should be replaced.

Also, consider hosing out the idle valve on top of the engine with electric motor/ electronics cleaner as it can get clogged. Takes 15 min. to release it from its hoses and spray it out.

If you are not in a state that hooks your car up to the OBDC port during the testing, CA does for example, once you check the above you can just clear the codes and see if and how soon they come back. If the light stays out long enough to get through the inspection you can get the car inspected and look into the issue when and if the check engine light comes back.

I am clearly not an expert but I do use Durametric and this would be my initial course of action. You can also look up through a Google search and find what others did to clear the codes.
Andy

Brig993

thanks...I should have mentioned its a Varioram engine. I have an ISV cleaning planned for the weekend to address the idle issue.

Jarg1

Good luck, but I have the exact same set of codes with a new ISV. I'm starting to think the Durametric info may be off and I'm planning to take it to someone who has a Porsche diagnostic tool if I can't resolve it on my own soon.

ToreB

I suspect the fault code readout from the Motronic to be erroneous. The list of fault codes from the Scantool software is copied below. I would expect there are some variations depending on Motronic software version, but the list would not be very much different.
The Climate Control Unit codes seem to be OK though, these are common faults.
Cheers,
Tore

;Motronic trouble codes
11=Power supply, DME, high
14=Engine temperature sensor 2
15=Throttle Potentiometer
16=Throttle Potentiometer
18=RPM Signal
19=Speed signal / Speedometer
21=Hot-wire mass air flow sensor
22=Oxygen sensor (Sensor signal)
23=Oxygen regulation / stop (intake air leak?)
24=Oxygen sensor short to+ or 0 Volts
25=Intake air temperature sensor
26=Ignition timing change
27=IAC opening/closing winding
28=IAC opening/closing winding
31=Knock sensor 1
32=Knock sensor 2
33=Control unit faulty, Knock computer
34=Hall signal
36=Idle CO potentiometer
41=Control unit faulty
42=Fuel pump relay (DME relay)
43=Tank ventilation valve
44=Auxiliary air pump relay
45=Warning lamp Check Engine
51=Injection valve 1
52=Injection valve 2
53=Injection valve 3
54=Injection valve 4
55=Injection valve 5
56=Injection valve 6
67=Ignition final stage
68=Ignition final stage
69=Ignition final stage

Brig993

Tore, thank you! so your saying that the code numbers are correct but the description from Durametric may be incorrect?

ToreB

I suspect either the numbers or the according text to be incorrect, I do not know. The numbers are not in range with the known values, and are reported several times.
I would suggest to use a different diag tool, either a Porsche tool or the Rennlist Scantool PC software with appropriate cable/adapter.
Cheers,
Tore

Brig993

I just ordered the T-OBD. We'll see what comes up once I get it. Anyone have a link for the scantool software?

ToreB

Thanks!
The software is available on the link on the bottom of the T-OBD product page.
Cheers,
Tore

pp000830

I use the very old version (5) of the Durametric cable with the older software. Sometimes when I hook it up I get a get bunch of codes, some valid some not. I shut down the program and reinstall the cable sometimes two or three times and then the software will read a coherent limited list of codes. Sometimes it will not read the engine module unless I read one of the other modules first such as the HVAC. It also doesn't like running on a laptop not plugged into the wall. I am sure most of these issues are sorted out on the newer version of the software. However, I have become familiar with how to interpret its function and I only need to use it once or twice a year usually for a misfire code I end up clearing that doesn't seem to return.

Andy