I have a 2001 911 turbo with 68,000 km. During a hard acceleration, PSM, ABS and Brake Fluid lights come on. When I restart the engine, these lights turn off but the PSM remains deactivated.

I have read lots of forums and none of them really address my situation. Some of the forums say that battery fluid shifts during a hard acceleration and can cause these lights to come on. I have changed the battery and the lights still come on.

These lights started to come on after I changed the drive belt. In order the changed the drive belt, I had to take of the air box and MAF. Some of the forums suggest that MAF sensor could be faulty. I was very careful with the MAF sensor and I didn’t drop it when I changed the drive belt. I believe if the MAF sensor is faulty, then I should get a fault code.

I don’t know if the brake fluid level senor is faulty. I don’t know how to test it. However, when I did disconnect the brake fluid sensor, the PSM and brake fluid lights came on. Then, I reconnected, both lights turned off.

If anyone has a suggestion, please reply to this post. I would greatly appreciate it!

 

I suggest to check to see if all the boost hoses are properly connected.

 

check codes via durametric... Im guessing maf or a boost leak.. hoses popped off

 

Thanks, I'll check the boost hose.

 

If that happened during hard acceleration, it should have been accompanied by a pronounced "Pooooh" as the boost hose was ejected from its seat. I have done this many times with the stock hoses. (All fixed now with new hoses)

I don't know what Porsche was thinking when they came up with this response to lost boost, but the codes and lights that illuminate have nothing to do with the fault at hand. If the hose popped back into the socket after the initial problem, it will not necessarily be readily apparent which hose was at fault. You will probably have to pull on each one to see if it is locked in or not. Start with the hoses you touched during your last maintenance. It is a pretty good bet that is the problem.

 

only car i've ever had where tugging on hoses was part of regular pre-flight maintenance lol

 

I did check the boost hoses and they're intact

 

... then you popped something else. It's going to be harder to find... Look at the thread about finding and fixing boost leaks - it's very useful!

 

Had something similar happen last weekend and it ended up being a pin in the waste gate came out. Lots of error warning and the car was bucking when you stomped on it

 

Mine does this. Has for the last 30000 miles under extended boost. Runs perfect besides the lights coming on. I've just lived with it.

 

^ i couldn't do it would drive me ( more lol ) nuts.

op.. you've gotta check the codes, it has to be storing and that'll tell you whats what.

 

Check the check valve.

 

Today I did clean the MAF sensor and no change. Today, the lights came on under a moderate acceleration on a bend when I made the rear wheels lose traction little bit. I then restarted the car and lights went off. However, the PSM hasn't worked ever since the lights started to coming on. Even when I restart the car and the lights turn off, I can spin the rear wheels, which means the PSM doesn't work.

 

that isn't so.

 

By now, since it has been mentioned twice, I'm sure you ahve checked the codes. So, what do they say???