Trouble Codes- System Too Lean
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Senior User
Joined: May 2002
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From: Mesa Arizona
Trouble Codes- System Too Lean
I got these trouble codes on my ODB II scanner:
171- System Too Lean and 174- System Too Lean (bank 2)
I did install a K&N FIPK and a Borla Cat Back. I got the code once before (after installing the mods) but cleared it by disconnecting the battery. I read somewhere here that when you do mods you need to "reset" the computer and then you would not get the SES light again. This lasted about 75 miles until it came on again. I cleared the code this time with the new scanner.
Does anyone know what what the remedy for these codes is? I have a 2003 V10 F-350
Thanks,
When on two wheels-
FXSTC
Mesa- AZ
171- System Too Lean and 174- System Too Lean (bank 2)
I did install a K&N FIPK and a Borla Cat Back. I got the code once before (after installing the mods) but cleared it by disconnecting the battery. I read somewhere here that when you do mods you need to "reset" the computer and then you would not get the SES light again. This lasted about 75 miles until it came on again. I cleared the code this time with the new scanner.
Does anyone know what what the remedy for these codes is? I have a 2003 V10 F-350
Thanks,
When on two wheels-
FXSTC
Mesa- AZ
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Joined: Apr 2002
Posts: 391
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Trouble Codes- System Too Lean
Could get a chip and richen up the fuel mix a little. A more open exhaust can scavenge some of the fuel from the cylinder and make the engine run lean and hot.
But come to think of it - the FIRST thing I would do is clean the MAF sensor on the intake very carefully. The oil from the K&N can coat the sensor and throw it out of calibration. K&N's sometimes come way over oiled. And most Ford MAFs do not go thru a self clean cycle like some others do where they heat up to burn off oil.
-Jim
2001 E-450 Superduty
But come to think of it - the FIRST thing I would do is clean the MAF sensor on the intake very carefully. The oil from the K&N can coat the sensor and throw it out of calibration. K&N's sometimes come way over oiled. And most Ford MAFs do not go thru a self clean cycle like some others do where they heat up to burn off oil.
-Jim
2001 E-450 Superduty
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From: Mesa Arizona
Trouble Codes- System Too Lean
>Could get a chip and richen up the fuel mix a little. A more
>open exhaust can scavenge some of the fuel from the cylinder
>and make the engine run lean and hot.
Thanks- I've got a Diablo on order. I'll see if this makes a difference.
>But come to think of it - the FIRST thing I would do is
>clean the MAF sensor on the intake very carefully. The oil
>from the K&N can coat the sensor and throw it out of
>calibration. K&N's sometimes come way over oiled. And most
>Ford MAFs do not go thru a self clean cycle like some others
>do where they heat up to burn off oil.
I'll do this also using the q-tip technique (although I do have the Grannetteli MAF).
Again- thanks!
When on two wheels-
FXSTC
Mesa- AZ
2003, F-350, Lariat, V10, CC, LWB, Dark Shadow Grey, 6sp Manual, Non-ESOF FX4, 4.30, Camper Pkg, et. al.
>open exhaust can scavenge some of the fuel from the cylinder
>and make the engine run lean and hot.
Thanks- I've got a Diablo on order. I'll see if this makes a difference.
>But come to think of it - the FIRST thing I would do is
>clean the MAF sensor on the intake very carefully. The oil
>from the K&N can coat the sensor and throw it out of
>calibration. K&N's sometimes come way over oiled. And most
>Ford MAFs do not go thru a self clean cycle like some others
>do where they heat up to burn off oil.
I'll do this also using the q-tip technique (although I do have the Grannetteli MAF).
Again- thanks!
When on two wheels-
FXSTC
Mesa- AZ
2003, F-350, Lariat, V10, CC, LWB, Dark Shadow Grey, 6sp Manual, Non-ESOF FX4, 4.30, Camper Pkg, et. al.
Posting Guru
Joined: Mar 2002
Posts: 2,245
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From: Vancouver Wash USA
Trouble Codes- System Too Lean
But come to think of it - the FIRST thing I would do is
>clean the MAF sensor on the intake very carefully. The oil
>from the K&N can coat the sensor and throw it out of
>calibration. K&N's sometimes come way over oiled. And most
>Ford MAFs do not go thru a self clean cycle like some others
>do where they heat up to burn off oil.
Yep, yep, this is what I'd do first. I'll just about guarantee that this is what it is. All things being constant but the K&N, and this being a common complaint with K&N users, I would certainly suspect this is the culprit.
Ken 98 E-350 XLT V-10 ClubWagon.
>clean the MAF sensor on the intake very carefully. The oil
>from the K&N can coat the sensor and throw it out of
>calibration. K&N's sometimes come way over oiled. And most
>Ford MAFs do not go thru a self clean cycle like some others
>do where they heat up to burn off oil.
Yep, yep, this is what I'd do first. I'll just about guarantee that this is what it is. All things being constant but the K&N, and this being a common complaint with K&N users, I would certainly suspect this is the culprit.
Ken 98 E-350 XLT V-10 ClubWagon.
Freshman User
Joined: Jun 2002
Posts: 30
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From: Texas USA
Trouble Codes- System Too Lean
I got the same codes on my 99 v10 f550 super duty. I change out the O2 sensor back by the converter and solved the problem. Bank 2 is the drivers side. Hope this helps..
Thread Starter
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Senior User
Joined: May 2002
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From: Mesa Arizona
Trouble Codes- System Too Lean
>I got the same codes on my 99 v10 f550 super duty. I change
>out the O2 sensor back by the converter and solved the
>problem. Bank 2 is the drivers side. Hope this helps..
I haven't had it recur since I cleared the codes over 200 miles ago. I think I'll let it go unless the come up again.
Thanks-
When on two wheels-
FXSTC
Mesa- AZ
2003, F-350, Lariat, V10, CC, LWB, Dark Shadow Grey, 6sp Manual, Non-ESOF FX4, 4.30, Camper Pkg, et. al.
>out the O2 sensor back by the converter and solved the
>problem. Bank 2 is the drivers side. Hope this helps..
I haven't had it recur since I cleared the codes over 200 miles ago. I think I'll let it go unless the come up again.
Thanks-
When on two wheels-
FXSTC
Mesa- AZ
2003, F-350, Lariat, V10, CC, LWB, Dark Shadow Grey, 6sp Manual, Non-ESOF FX4, 4.30, Camper Pkg, et. al.
Trailering
Joined: Sep 2002
Posts: 16
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Trouble Codes- System Too Lean
Just found this web page recently trying to solve those same problem codes. Ended up being a vacum leak. PCV hose from RH bank had a hole in it right before it enters the throttle body. A freind at the local dealer said he's seen it several times.
Dean
Dean
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Joined: Jun 2002
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From: Texas USA
Trouble Codes- System Too Lean
I had the same on a 99 v-10...O2 sensor change on the drivers side and ok...I believe someone else mentioned the same....
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From: Roswell USA
Trouble Codes- System Too Lean
>Ended up being a vacum leak. PCV hose from RH
>bank had a hole in it right before it enters the throttle
>body. A freind at the local dealer said he's seen it several
>times.
>
>Dean
I had the same thing happen to me. Right at the elbow before entering the engine (TB). Burger was hard to find. Had it Auto Zone but the guy could't figure it out from the codes. Took it to his dad who has a service shop and found it w/ a garden hose. Said he had an Explorer in the previous week w/ the same problem.
>bank had a hole in it right before it enters the throttle
>body. A freind at the local dealer said he's seen it several
>times.
>
>Dean
I had the same thing happen to me. Right at the elbow before entering the engine (TB). Burger was hard to find. Had it Auto Zone but the guy could't figure it out from the codes. Took it to his dad who has a service shop and found it w/ a garden hose. Said he had an Explorer in the previous week w/ the same problem.
