EPC and three error codes

[MKGIY]

I have a 2012 S4 with the EPL 93 DP tune as well as TCU tune. Today I was in sport mode going up a steel hill in boost at about 70 mph and the EPC light came on and cut all power. When I pulled over to shoulder it was very erratic with the idle. I turned the car off and back on, the EPC light went away and I babied the car home. I scanned for fault codes and the following came up, does this sound like coil packs?

6358 - Bank 1; Fuel Measuring System 2
P1093 00 [032] - Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear

6209 - Fuel Trim; Bank 1 (Mult)
P1127 00 [104] - System too Rich
Intermittent - Confirmed - Tested Since Memory Clear

6213 - Fuel Trim; Bank 2 (Mult)
P1129 00 [096] - System too Rich
Intermittent - Not Confirmed - Tested Since Memory Clear

Thanks,

[whiped]

Doubtful it is the coil packs.

Probably related to the tune or the fuel itself.

You can log fuel rail pressure, lambda and requested/absolute boost to look more into it.

[bhvrdr]

If you were going up a hill and kind of lugging it at 2000rpm or 2500rpm at part throttle that is an extremely high load situation where you tax the fuel system and you can find issues with fuel or issue with boost targets/actuals being off. Since it is a fuel trim code that prob rules out boost issues (you'll usually get a throttle position code instead of fuel code for that). It was on both banks so not likely an o2 sensor issue. Log lambda, low pressure, high pressure, and stft under a similar logging situation (go 4th gear part throttle lugging it from 1800rpm to 4000rpm a couple times. Nice and steady so it doesnt kick down. After your diagnostics you can also go ahead and clear the ECU codes to reset fuel trims.

BTW, also check the vacuum line at your air intake. Make sure it didnt come loose.

Mike

[LittleDozer]

Car was getting too much fuel. Could be a mechanical problem with your HPFP or the sensor plugging into the HPFP that measures flow.

Did you recently fill up a new tank of gas? If your last tank had a mix of 93 and E85 and this tank was just 93 it would run rich until the fuel trims readapt.

Only time I've ever had rich codes is when I put in a fresh tank of E85 and stomped on it before the fuel trims had readjusted to the new ethanol content.


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[MKGIY]

I was in 7th gear, so I was lugging it. I will try to run some logs and see what I find.

Thanks,

[LittleDozer]

I was in 7th gear, so I was lugging it. I will try to run some logs and see what I find.

Thanks,

Had your car warmed up yet? Could have still been in closed loop which runs rich. I've found the DP tune is more sensitive to being warmed up before spirited driving.

WOT in 7th gear if you aren't going fast is pretty hard on the car too.

I wouldn't be too concerned unless it happens again.


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[MKGIY]

Only 93 in the tank and I was driving for about an hour when this happened. I will see if I can run some logs this weekend and hopefully this will not happen again.

Thanks,