Codes P0600,P0134,P1188,P0170,P1250

[stealthmode]

Hi, new to the forum and to BMW. Recently purchased a 1996 328i Convertible 5 speed and has 101k on it. All original that I know of.

Like title says I've been getting these codes since I've had it. I've looked at the definition of each code, but there are so many different possible solutions, I'm just looking for some help.

Car runs just fine if I clear the codes, but after awhile it will start to misfire/sputter and codes will return eventually. Also when I clear the codes and restart the car the only code that comes back immediately is the P0600 code. After some time some if not all of the other codes will return too. What should I test/look at as the culprit? Thanks for any help!

[flyfishvt]

Almost all of those codes can be explained as "fuel trim" problems. Fuel Trim is the air/fuel mix. It appears to be wrong on your car so you're getting several different codes.

This can be caused by several things. A dirty MAF, a faulty primary O2 sensor (in your case its the sensor for cylinders 1-3, AND...a vacuum leak.

Start with a test for vacuum leaks. Remove and inspect your rubber intake elbow for cracks. Flex the elbow to find any hidden cracks. Make sure your MAF clamps are tight and not allowing air to leak in.

The best test is the Carb Cleaner Test. Do a search for this. its very simple and only takes a couple minutes.

Check this thread too...http://repairpal.com/obd-ii-code-p0134

[stealthmode]

Almost all of those codes can be explained as "fuel trim" problems. Fuel Trim is the air/fuel mix. It appears to be wrong on your car so you're getting several different codes.

This can be caused by several things. A dirty MAF, a faulty primary O2 sensor (in your case its the sensor for cylinders 1-3, AND...a vacuum leak.

Start with a test for vacuum leaks. Remove and inspect your rubber intake elbow for cracks. Flex the elbow to find any hidden cracks. Make sure your MAF clamps are tight and not allowing air to leak in.

The best test is the Carb Cleaner Test. Do a search for this. its very simple and only takes a couple minutes.

Check this thread too...http://repairpal.com/obd-ii-code-p0134


Thank you! After a quick check I found the rubber intake has been wrapped in electrical tape. Took the tape off and found it's deteriorated quite a bit. The tape was pretty much the only thing holding it together. Time for a new one then?

[flyfishvt]

That boot is allowing air to get in that isn't being measured by the MAF. It's throwing your fuel/air mix all out of whack.

[stealthmode]

Okay, I swapped the intake boot with a good one from a friend and no difference. Maybe o2 sensor? What about the P0600 code? Why does that come back immediately after I cleared it and restarted the car?

:help

Bump