Engine not shutting off after key is removed(VID)

[B6JoeS4]

This has happened before and now it's slowly getting worse and worse. After I remove the key from the ignition, the engine kind of sputters and then dies. Sometimes it keeps going for 5 seconds, but sometimes, it only does it for a couple seconds like it did in the video below. It seems to only do it when the engine is hot.
[ame]http://www.youtube.com/watch?v=mJae_bkf7pw[/ame]

I am also having a similar issue, where the electronics stay on for a few seconds after the key was removed as seen here:
[ame]http://www.youtube.com/watch?v=rZvpQt1HAwc[/ame]

[sakimano]

weird

2x my key has just turned in the ignition without starting it. Sounds like your problem is the opposite...but similar. Has that ever happened to you?

[mbgt72]

that is weird, and a bit scary too.

Off topic, one of my favorite features of any car is how in our boxster, the radio stays on for about 15 seconds after you turn the car off (from the factory & normal, at least I think haha). It's just really nice b/c as you're getting out, whatever you're listening to is still playing. I like that feature a lot and would love to see it more often.

[dmaxben]

Ignition switch?

will vagcom display/log ignition switch "status" or what switch status signal is being sent to the CCM?

How many different ignition-hot circuits are there in the B6/B7? Its almost as if the ignition switch has a short so that it cuts off some electronics in the car (note the ESP light comes on immediately when you turn the key off, so the EBCM is obviously powering down right when its supposed to) but is leaving some others (ie, the ECM ign-hot circuit) on for a few extra seconds?

Does the radio/HVAC module turn off immediately or does it stay on for a few seconds as well?

[B6JoeS4]

Saki - No that has never happened to me before. that would be kind of nice actually.

It runs for a pretty long time sometimes, but it never goes voer 400rpm when it does it. It is getting spark, and obviously fuel. So i think the fuel pump is staying on. that or, it is just running on whatever is in the lines. I really doubt that though.

Could it have to do with me being completely catless? Maybe the reduced backpressure along with my LWFW is allowing the motor to run more than it should.

[Silver B6 S4]

Do you have a tune?

Sounds like your car is running super rich, and the cylinders are hot enough to ignite the fuel. (No spark needed)

[halik]

Do you have a tune?

Sounds like your car is running super rich, and the cylinders are hot enough to ignite the fuel. (No spark needed)

There should be no injector pulses after the ignition is cut. Probably ignition switch problem where you're not getting a good contact in the off position.

[04.5 GLI]

sounds like the ignition switch. what this sounds like is the switched power is not reading correctly.

there is a few ways to diag. the switch with vag com. your going to want to access the comfort system. 46. there are a few mvb (measuring value blocks) that display 15 and 30 power. that is your constant and switched ignition. ill do some more research and find out which mvb to check.


the 1st thing that your going to want to do is check all of your dtc's diagnostic trouble codes in every system. the ignition switch will display faults in various module for ignition open circuit short to positive or short to ground.

[B6JoeS4]

Ok thanks guys, I will go out and VAG the car tomorrow. too cold out now lol.

I just ordered Bentley manual, so I am ready to go whatever it is. I am hoping it will be just a matter of dirty/loose contacts in the ignition switch.

The car does NOT have a tune and I run O2 spacers so I could see how it could run rich, but then again, the injectors sohuld not be supplying any fuel to the cylinders anyways

[B6JoeS4]

But do you think that there would be enough fuel in there for probably 4-8 cycles?

[halik]

No shit Sherlock, but if he's running rich, there will be extra fuel in the combustion chamber after the injectors have cut off.

91 octane or higher burns slower than 87...

Heh might wanna brush up on the mechanics of a 4stroke cycle ...

[beemercer]

Could it have to do with me being completely catless? Maybe the reduced backpressure along with my LWFW is allowing the motor to run more than it should.

That won't do it, it sounds like an issue where the ECU doesn't know what's going on like how 04.5GLI described.

[B6JoeS4]

Scanned the car this morning: Here are teh codz:

16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold

P0421 - 001 - Upper Limit Exceeded - Intermittent

17980 - Left Engine Mount Solenoid Valve (N144): Short to Ground

16654 - Fuel Injector #4 (N33): Short to Ground

P0270 - 002 - Lower Limit Exceeded - Intermittent

17880 - EVAP Leak Detection Pump: Short to Ground

P1472 - 002 - Lower Limit Exceeded - Intermittent

17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground

16421 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit: Short to Ground

P0037 - 002 - Lower Limit Exceeded - Intermittent

------------------------------------------------------------------------

00576 - Terminal 15

57-10 - Electric Circuit Failure - Intermittent

---------------------------------------------------------------------

01320 - Control Module for Climatronic (J255)

49-10 - No Communications - Intermittent

[beemercer]

^Did you clear the codes and then rescan? You've got a lot going on there, sometimes they randomly pop up and won't come back after they are cleared.

[B6JoeS4]

Yeah I tried, but the problem only happens when the motor is hot. So i got nothing

[beemercer]

^Well even still we can try to work out the other issues that are popping up. That's a lot of codes to come up and the fact that a significant number of them are short to ground is disconcerting. Hopefully 04.5GLI will get a chance to see these because he'll have the best insight.

16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 001 - Upper Limit Exceeded - Intermittent - probably from being catless

17980 - Left Engine Mount Solenoid Valve (N144): Short to Ground
16654 - Fuel Injector #4 (N33): Short to Ground
17880 - EVAP Leak Detection Pump: Short to Ground
17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground
16421 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit: Short to Ground - Strange that all these sensors are shorted out?

[halik]

Wow all those short to ground codes, I would check that both positive leads on your battery are making good contact.

Maybe water in the ecu box or something? There's also one positive lead inside that box, thought this is all around weird.

[B6JoeS4]

About the o2 sensor....Does it get it's ground from the exhaust system? or is it grounded in the harness?

[halik]

About the o2 sensor....Does it get it's ground from the exhaust system? or is it grounded in the harness?

Harness,
the pinout is heater,heater ground ,signal, signal ground.

I think you've got a lose + wire somewhere. Short to ground means it's not getting any voltage, short to + means no resistance.

[Ess_four]

B6JoeS4: Did you get to the bottom of your DTC's?

Interestingly my car also decided to throw a lot of Short to Ground codes last night during the long drive back to Germany,

17980 - Left Engine Mount Solenoid Valve (N144): Short to Ground P1572 - 002 - Lower Limit Exceeded
17833 - Tank Vent.Valve Short to Ground P1425 - 002
17984 - Right Eng. Mount Solenoid Valve Short to ground P1576 - 002
17843 - Secondary Air Pump Relay (J299): Short to Ground P1435 - 002 - Lower Limit Exceeded
17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground P1421 - 002 - Lower Limit Exceeded
16440 - Oxygen (Lambda) Sensor B2 S2: Heating Circuit: Malfunction / Open Circuit P0056 - 004 - No Signal/Communication
16421 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit: Short to Ground P0037 - 002 - Lower Limit Exceeded
19474 - Valve for Exhaust Flap 1 (N321): Short to Ground P3018 - 002 - Lower Limit Exceeded - Intermittent Signal too Low
16486 - Mass Air Flow Sensor (MAF/G70): Signal too Low P0102 - 002
16415 - Oxygen (Lambda) Sensor B1 S1: Heating Circuit: Short to Ground P0031 - 002 - Lower Limit Exceeded
16435 - Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1) P0051 – 002
17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High P1114 - 002
17548 - Oxygen (Lambda) Sensor; B2 S2: Internal Resistance too High P1140 - 004 - No Signal/Communication

I have cleared the codes only for them to come back immediately. Also the and ABS light is constantly on.

I recently re-oiled the filter so this may be the cause for those codes, Anyway, I will check and clean the MAF with contact cleaner and hope it takes care of the MAF related codes.

I have been getting codes and a CEL related to the rear 02 sensors for some time and actually have a pair waiting to be installed. Again I hope this will take care of the rear 02 related codes.

What is confusing are the number of Short to Ground codes and the ABS light. I do remember the ABS came on just after hitting a pot hole at about 20mph. It has stayed on ever since. Any reasons why the ABS is permanently on?

The car still drives smoothly and pulls OK. No noticeable loss in power or increased fuel consumption.

There was a heavy rainstorm whilst driving and I recently had my windscreen replaced does anyone think the Short to Ground codes are related to either?

[Ess_four]

Problem sorted. Fuse number 32 had blown. All codes have been cleared and have not returned. Everything is back to normal.

[Joey]

Problem sorted. Fuse number 32 had blown. All codes have been cleared and have not returned. Everything is back to normal.

Thanks for updating us!