A4 has no power, shuttering down the road, low fuel pressure rail code, ECM lights up - AudiWorld Forums

Go Back   AudiWorld Forums > Audi Models > Audi A4 > A4 (B7 Platform) Discussion
Log In 


A4 (B7 Platform) Discussion Discussion forum for the B7 Audi A4 produced from 2005-2008.5

     
Old 08-05-2016, 11:04 AM
How-Tos on this Topic
 
Last edit by: IB Advertising
See related guides and technical advice from our community experts:Browse all: Audi A4 (B7) Fuel Pump System Guides
Print Wikipost

A4 has no power, shuttering down the road, low fuel pressure rail code, ECM lights up

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 06-21-2014, 07:10 AM   #1
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default A4 has no power, shuttering down the road, low fuel pressure rail code, ECM lights up

It's been a few days since this started, it's getting progressively worse, it seems to have trouble selecting a gear or staying in the wrong gear too long. I don't really know where to start with this. This is extremely distressing to me, I don't even dare to take it out for a drive at this point. Help!
TheRoberto is offline   Reply With Quote
Old 06-21-2014, 01:07 PM   #2
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

I'm sorry it's not the ECM it's the EPC. I also tried unplugging the MAF sensor it just made my idle rougher otherwise no difference.
TheRoberto is offline   Reply With Quote
Old 06-25-2014, 08:16 PM   #3
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

So all day today on three different start/drives it's just been the CEL and the cars gone fine. I'm betting the filter on the pump on the tank is filthy and unable to provide enough gas to the hpfp under load causing the car to go into limp mode. I find out tomorrow at the dealership. Fingers crossed they will just pull it and clean it and thats the only problem.
TheRoberto is offline   Reply With Quote
Old 06-30-2014, 12:15 AM   #4
AudiWorld Member
 
Join Date: Jun 2014
Posts: 147
Default

When you have the EPC light come on it usually means there's something going on with the computer. Electronic Program Control. Get yourself a cheap ebay cable that'll work with a b7 A4 and scan for codes.(not endorsing non vagcom cables)
Dolamite is offline   Reply With Quote
Old 06-30-2014, 05:42 AM   #5
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

The problem is so bad now I brought it to Audi for diagnostic and they narrowed it down to G247 low pressure sensor or hpfp. I put the codes on the other thread. What do you think?
TheRoberto is offline   Reply With Quote
Old 06-30-2014, 07:49 AM   #6
AudiWorld Member
 
Join Date: Jun 2014
Posts: 147
Default

Quote:
Originally Posted by TheRoberto View Post
The problem is so bad now I brought it to Audi for diagnostic and they narrowed it down to G247 low pressure sensor or hpfp. I put the codes on the other thread. What do you think?
All your codes point to the low pressure side and the circuit being disconnected on the sensor g247.

Knowing Audi, they're taking the cheapest first approach and if it doesn't fix, their going to look at the low pressure fuel pump. I believe you already checked the fuel filter?

If it was high pressure related you might've seen P2293 and a remark on the N276 sensor as one.

I don't think it's your high side just by the codes you gave. What is disconcerting is the EPC light. It may be associated with limp mode being triggered I don't know. Just out of curiosity, were your PRNDS on the dash flashing at any point?
Dolamite is offline   Reply With Quote
Old 06-30-2014, 09:05 AM   #7
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

No flashing.
TheRoberto is offline   Reply With Quote
Old 06-30-2014, 09:07 AM   #8
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

We pulled the G247 off and used one from another car to trouble shoot and nothing changed. The EPC would go on when the car went into limp mode, you're right, and now it's on and in limp mode all the time. It is also starting progressively harder when cold.
TheRoberto is offline   Reply With Quote
Old 06-30-2014, 09:08 AM   #9
AudiWorld Member
 
Join Date: Jun 2014
Posts: 147
Default

Cam follower checked recently? Do you drive with a empty tank a lot?
Dolamite is offline   Reply With Quote
Old 06-30-2014, 09:16 AM   #10
Audiworld Junior Member
 
Join Date: Jun 2014
Posts: 18
Default

Cam follower looks brand new and is about 2,000 miles old. I never drive on an empty tank but I did recently get gas at a Gulf and thats about the time it started happening. When we changed the fuel filter the gas looked pretty dirty. My mechanic thought it was odd but wasn't really concerned because there was no water in it.
TheRoberto is offline   Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Why I hate NJ's numbnuts rules... carl viking A8 / S8 (D3 Platform) Discussion 34 08-22-2016 07:44 PM
:: ECS Tuning :: NEW!! B8 A4 2.0T ECS Baffled Oil Catch Can ECS Tuning-Audi A4 (B8 Platform) Discussion 12 08-08-2016 05:57 AM
Audi A4 2002 S4 6spd 98k rsixxer23 Vehicles For Sale 4 01-06-2016 03:25 AM
:: ECS Tuning :: NEW!! B7 A4 2.0T ECS Baffled Oil Catch Can ECS Tuning-Audi A4 (B7 Platform) Discussion 0 09-01-2015 09:16 AM
:: ECS Tuning :: NEW!! B8 A5 2.0T ECS Baffled Oil Catch Can ECS Tuning-Audi Audi A5 / S5 / RS5 Coupe & Cabrio 0 09-01-2015 08:27 AM


Tags
a4, audi, disconnected, fuel, pressure, rail, v6

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 07:20 PM.