Strange problem -will paypal some $

**p310b** · 05-17-2016 10:50 AM

Hi Guys,

Last week I got this P0191,g247 short to ground code. Traced the wiring and found a little nick, fixed it. After that another code shown up, it was P0190 which is g247 circuit malfunction.
Ordered new G247 with vin specific and replaced it.

Guess what, I heard rattle on my HPFP and my car thrown me another 3 codes.

P0652-002 sensor reference voltage B too low(G31,CMIIW)

P2127-002 G185 accelerator position sensor, signal too high

P0343-001 (G40) signal too high

I was so tired dealing with this problem, what odd is everytime I unplug the G247 socket those 3 codes above and the HPFP ticking is gone but still, and left me with G247 malfunction codes.

So with G247 plugged I will have 3 codes above. And with it unplugged it gives me G247 malfunction.

If anyone could help me I will be very gratefull and willing to paypal some$.

Thanks Audizine!

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**Okedokey** · 05-17-2016 11:39 AM

Disconnect your battery, and short the battery leads together for 20 minutes. Replace and drive the car. Rescan.

**1killera4** · 05-17-2016 11:59 AM

Originally Posted by Okedokey

Disconnect your battery, and short the battery leads together for 20 minutes. Replace and drive the car. Rescan.

You forgot "Wait for the loud boom"

**Okedokey** · 05-17-2016 12:39 PM

Why?

**p310b** · 05-17-2016 11:20 PM

Originally Posted by Okedokey

Disconnect your battery, and short the battery leads together for 20 minutes. Replace and drive the car. Rescan.

So you are saying its the battery problem. My battery read 13,..V on VCDS when the engine running. And its 2years old.

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**Okedokey** · 05-17-2016 11:28 PM

Originally Posted by p310b

So you are saying its the battery problem. My battery read 13,..V on VCDS when the engine running. And its 2years old.

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No Im saying you need to clear all the codes from the ECU manually and then see what comes up. You don't even have to drive it, just run it again.

Also 13 V with the engine on is too low. It should be around 14.4. A low voltage can cause this issue. Clear the ECU as described, charge the battery and scan again.

**p310b** · 05-17-2016 11:30 PM

Is it save to short the battery lead?

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**Okedokey** · 05-17-2016 11:31 PM

Yes, you are simply discharging the car. You short the leads with the BATTERY DISCONNECTED ENTIRELY>

**p310b** · 05-17-2016 11:42 PM

Doing it now, I will let you know whats coming up.

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**p310b** · 05-18-2016 12:17 AM

Originally Posted by Okedokey

Yes, you are simply discharging the car. You short the leads with the BATTERY DISCONNECTED ENTIRELY>

Ok, I did it, the same symptomps still happened, 3 other codes with G247 plugged and G247 malfunction code with it unplugged. What could be the problem?

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**Okedokey** · 05-18-2016 12:25 AM

Charge your battery before you do anything else.

**p310b** · 05-18-2016 10:22 AM

My batt voltage is reading at aroun 12.5v at idle. Could it be the problem?

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**crazyquik22023** · 05-18-2016 10:26 AM

Originally Posted by p310b

My batt voltage is reading at aroun 12.5v at idle. Could it be the problem?

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12.5v its pretty low, i would at the very least have the battery tested. Your battery probably has a dying cell in it. It is possible to cause short to ground errors with a low voltage battery.

**BenMTL** · 05-19-2016 05:55 AM

Originally Posted by crazyquik22023

12.5v its pretty low, i would at the very least have the battery tested. Your battery probably has a dying cell in it. It is possible to cause short to ground errors with a low voltage battery.

This.

Voltage at idle should be 14v+ because of the alternator running, when the car is off, it should be like 12.8v. If it is anything lower than that, your battery is dying and can cause all kinds of weird codes on our cars (I know, my battery just died after 5 years 2 days ago).

**p310b** · 05-19-2016 12:41 PM

Let me try to replace my battery this weekend. Thanks for the advice. Will let you guys know if its working.

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**p310b** · 07-08-2016 05:11 AM

Sorry for the report. The problems still there after i replaced my batt...

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**p310b** · 07-08-2016 05:16 AM

If anyone could help

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**keaton85** · 07-08-2016 06:24 AM

What are you getting for voltage readings now?

Idono why people said to replace the battery, even if the battery was weak, the alternator would still be showing 13Vds-14Vdc range. don't get hung up on the alternator output numbers to much as it does vary with load, rpm and so forth. If the battery is showing in the 12Vdc range while idling, you are not charging the battery and the issue is with alternator output. Standing voltage after charging can be anywhere in the 12.4Vdc to 12.8Vdc range depending on load on the system.

**p310b** · 07-08-2016 08:56 AM

It was arround 13-13.5 at idle. Could it be the altenator? Thanks for helping. So do you thing all problems is coming from electricity current?

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**keaton85** · 07-08-2016 05:29 PM

If your over 13Vdc, I wouldn't worry about the charging, although, if this is an intermittent issue with the alternator that could cause issues as well. Get a cheap cigarette lighter volt meter and monitor that for a while. Just to see what you get during a daily basis, since you stated it was under 13Vdc at one point during idle correct?

Realistically, I think your battery and charging system is fine, but it is something to monitor while you are working on these issues. Hope that helps...

**Okedokey** · 07-08-2016 05:50 PM

I still think 13 -13.5 is too low. Should be over 14. You may want to look at the voltage regulator on the alternator.

**p310b** · 07-09-2016 12:35 AM

Im having the altenator check scheduled next week. But could it be something else with all the sensor codes? Or it is current issue?

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**Caconway2322** · 07-09-2016 09:30 AM

I really do not believe you have an alternator problem I need more information to confirm that I am mechanic and I work for the city of Cleveland Ohio use to work at dealerships. I just changed my battery and went through something sounding similar. On the newer cars they don't constantly charge (full field) the batt so in short they trickle charge the batt from the alt and when the batt voltage gets low enough it will the full field the alt then take it up to about 14.3 then start all over again. This is the job of the voltage regulator built inside your alt.

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**Caconway2322** · 07-09-2016 09:44 AM

If you run the car and check batt voltage then have another person put on your headlights high beams blower motor on high wipers you should see a drop in voltage and then it will go up if it does that alt is fine. Batt will be fine if you have a strong start every time. If it's slow to crank, hesitation, or groggy these are basic signs of a weak batt I'd just change it buy it from Audi I found it's cheaper than advanced auto parts or Autozone those guys will sell you a batt that is 500-760 cold cranking amps. You don't need all that it's a waist unless you plan on playing your radio with the eng off a lot. The cold cranking amps is how many amps you need to crank the 4 cylinders over with thick cold oil with out bogging brown your starter. There is actually a formula out there based on eng displacement I do believe. The 4.2 liter only needs 520 ish cold cranking amps. The 2.0t only needs 3-400. You would use a 700 cold cranking amps for and old big block Chevy or a big diesel eng. any questions?

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**p310b** · 07-09-2016 10:11 AM

Hi. Thanks for all the reply. Love this forum.

Update. Now the car wont even crank after sitting. The light ,radio all works, the voltage reading around 12.4v on vcds. Clear all the codes.

And this g247 is the only codes whenever I unplugged the sensor. Once I plugged it theres lots of short to ground and either to high or to low signal codes.

Its driving me insane.

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**p310b** · 07-09-2016 11:35 AM

Could it be the fuel pump relay? Can anyone confirm its 614 with 4pin and 70A. Thanks.

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**Okedokey** · 07-09-2016 12:28 PM

Yes thats the one. Any relay with the same package and specs will work. You'll find them much cheaper online or at a local electronics store than at Audi.

**Caconway2322** · 07-09-2016 01:17 PM

You should really buy a Bentley Manuel for your car if your going to try and fix it. And a intro to electrical repair and diagnostics. Sounds like your guessing and trying to get someone to diagnose it for you and more than most likely we are not getting enough information. You need to use a test light and check the wiring to make sure you have proper powers and grounds then test the relay. Pretty basic stuff. Happy to help but you have to learn to help yourself. Get a book.

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**allstock** · 07-09-2016 01:35 PM

Originally Posted by Caconway2322

Get a book.
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"Get a Book"... haha. Brutal

**Caconway2322** · 07-09-2016 02:22 PM

Not trying to be mean just saying. Need more input.

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**p310b** · 07-10-2016 05:20 AM

I own a copy of elsa and etka. And i have to cross the sea just to get the nearest audi dealer. Yes i'm the only one own an audi in this island. Im not guessing. Also own a genuine vcds. Its just all the code that being thrown at me is all weird. I even rewire most of my sensor to ecu. And still it is throwing the same code.

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**p310b** · 07-10-2016 05:21 AM

What input do you need? I might forgot to mention something.

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**Caconway2322** · 07-10-2016 09:20 AM

Check your powers and grounds at the relay check the relay. You need to check for complete circuits. Using a test light.

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**p310b** · 07-11-2016 04:03 AM

Ok, i'll invest some tool for checking. I'll let you know. Thanks:)

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**p310b** · 10-05-2016 04:38 PM

Still havent found out the problem :(
If anyone know something

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**Okedokey** · 10-05-2016 07:20 PM

So let me get this straight, when you plug the fuel rail sensor loom in, it gives you codes. Check the wiring.

**p310b** · 10-05-2016 07:23 PM

Yup, all wiring that associated with the code has been replaced. I dont know if it could be another wire. After I replaced my battery and rebuild the alternator, I still got 12.5v on idle.

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**Okedokey** · 10-05-2016 08:49 PM

Have you checked the battery in the multimeter? You sure the wiring to the sensor is in good condition (testing while moving the wires to replicate engine vibration).

**p310b** · 10-05-2016 08:55 PM

Yes the battery is in a good condition. The wire I can make sure in a good cond. Could it be something else? Missed timing or a bad HPFP?

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