When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
9 hours driving in her yesterday. Fired her up at lunch time and she ran a little rough. This is the third time it has happened. It actually stalled out the first time. When I got back from my errand was running good.
I checked the codes and only had these:
Error Code 1023
Bar Ignition Module Cylinder 4
Upper Limit Value Exceeded
Error Code 0421
Throttle valve adjusting unit - emergency air pos
Upper limit value exceeded
I don't know what the "Bar" part of that code is, but bar is a way to measure pressure. I'm guessing that code might be related to the injector on cylinder #4 either losing pressure or getting to much pressure. The other fault code is probably related to that.
If it's an injector issue on a DFI motor, you don't want to drive it until you know what's wrong as if it's not spraying properly can wash fuel from the cylinder walls abd create much larger issues, like scoring.
Not sure what the other code is, and if the two are related. But I'd reset the throttle body just in case. Turn key to on position without starting car. Wait 30 seconds until you hear a clack-clack sound from TB.
Are coil packs something where if you replace one, you should replace all of them?
I don't think that is necessary nor is it that big of a headache to pull the muffler and get back in there. However I think they are sold in a pack of 6, at least that is how they are sold at Suncoast. The coil pack condition can be evaluated. The one throwing the code may look bad with either some cracking or otherwise fouled appearance.
That said, if you're going to replace them all, I would swap the plugs too while you're in there. The additional cost is minor at that point and it helps rule out the plug as a source of problems.
Not sure what that error 0421 is referring to, but fully cleaning the throttle body would be a free action to possibly resolve it.
On the 0421, I found that you can recalibrate the the Throttle Valve Adjusting Unit by turning the car off, then putting it in the on position without starting it or touching the gas for 60 seconds, then turning it off for 10 seconds.
I am traveling, but I will try it when I get home.
If that does not work, I will take @GoldenGorilla 's advice and clean out the unit.
My muffler bolts are really corroded, and I have stepped around this by paying Porsche to change the plugs because they can do it without removing the mufflers. It looks like the time may be here where I bite the bullet and fix the muffler bolts.
OK, I did the throttle valve reset and it cleared both codes!!!!!!!!!!!!!!!!!! YEA!! No codes from the engine at all!
Some ones popped up from the seats and A/C, because 10 years old, and I went to clear the Air Conditioner codes and it killed my durametric. I uninstalled and reinstalled and it still wont start. SMH
OK, I did the throttle valve reset and it cleared both codes!!!!!!!!!!!!!!!!!! YEA!! No codes from the engine at all!
Some ones popped up from the seats and A/C, because 10 years old, and I went to clear the Air Conditioner codes and it killed my durametric. I uninstalled and reinstalled and it still wont start. SMH
The car won't start or the Durametric program won't start on the PC?
The car won't start or the Durametric program won't start on the PC?
It is the Durametric 6 software. I guess I will have to uninstall again and then go in and relocate all the files that are left. The car is running fine.
So...... I jinxed myself. I got a CEL today. It says take it to the workshop.
Code 0004 Upper limit exceeded.
The google says P0040 appears to be a generic OBDII code that almost no manufacturers use having to do with gas leaking out of the high pressure rails on diesels.
My Porsche 997 The essential companion says P0040 is:
O2 sensor signals swapped bank 1 sensor 1 / bank 2 sensor 1 <- to quote Oh Brother Where Art Thou "THAT DON'T MAKE NO SENSE"
So...... I jinxed myself. I got a CEL today. It says take it to the workshop.
Code 0004 Upper limit exceeded.
The google says P0040 appears to be a generic OBDII code that almost no manufacturers use having to do with gas leaking out of the high pressure rails on diesels.
My Porsche 997 The essential companion says P0040 is:
O2 sensor signals swapped bank 1 sensor 1 / bank 2 sensor 1 <- to quote Oh Brother Where Art Thou "THAT DON'T MAKE NO SENSE"
Any insight welcome!!!!
Error 0004
The description of that code to me means that you have two of your O2 sensor wires switched where they plug into the board at the back of the engine compartment. All 4 plug into that little black board to the left of my blue air filter cover and to the rear of the RSS engine mount. I can't remember if they are color coded by side or by front/rear, but you may have 2 of those plugs reversed if the description of that code is accurate.
The description of that code to me means that you have two of your O2 sensor wires switched where they plug into the board at the back of the engine compartment. All 4 plug into that little black board to the left of my blue air filter cover and to the rear of the RSS engine mount. I can't remember if they are color coded by side or by front/rear, but you may have 2 of those plugs reversed if the description of that code is accurate.
The issue is that I have not disturbed those wires. This morning, I went out and jiggled them but they look solid. Tried to clear the codes again but nothing. Off to the Indy.
The issue is that I have not disturbed those wires. This morning, I went out and jiggled them but they look solid. Tried to clear the codes again but nothing. Off to the Indy.
Hmmm. Curious to find out what your Indy says is the cause of the codes.
The Indy called and said it is showing insufficient CAT function. He is changing the O2 sensors as a precaution before recommending new CATs.
As a reminder it is a 2010 Carrera S M6 with 147K miles.
1) Has anybody actually seen Catalytic Converter wear out? I thought the point of catalysis is that it that the catalyst remains unchanged.
2) He said that a sports CAT might be cheaper than OEM if he could not find an old one. (they do a lot of mods so they may have one from when they put in a sports CAT) Is there a downside to a sports CAT?
3) Any other thoughts (I really did not want to drop $6k on CATs)
07-26-2019, 03:15 PM
So close to clearing all the codes!
