Error code 341

Reply Subscribe

Thread Tools

Search this Thread

Apr 29, 2002 | 05:07 PM

gloughe

Thread Starter

New User

Joined: Apr 2002

Posts: 2

Likes: 0

Error code 341

I have a 94 Ford Explorer and I get a error code 341 ( octane adjust service pin in use ). I can't find anything that tells me how to correct this. Any help is appreciated

Apr 29, 2002 | 05:26 PM

mrshorty

Postmaster

Joined: Dec 2001

Posts: 3,742

Likes: 2

From: UT

Error code 341

according to [link:www.dalidesign.com/hbook/3digit.html/|http://www.dalidesign.com/hbook/3digit.html] that code is informational only. I don't know for sure myself, but it may not indicate any kind of fault.

Apr 30, 2002 | 12:08 AM

Dialtone

Elder User

Joined: Aug 2001

Posts: 942

Likes: 0

From: South Texas

Error code 341

My Haynes manual describes the code as "Octane adjust service pin OPEN". The code is only detected during a Key on, engine off test.

I think I have seen this on the wiring harness in the general area of the self test connector leads. On my 91, it is a grey plug, plugged into a wiring harness connector. The wiring diagram shows a shorting bar on a lead from the ECM to the EDIS module (lead color PINK?). I think it is used to slightly advance the timing a few degrees when removed, when higher octane gasolines are used. Do you notice any pinging or do you use higher octane than regular unleaded in the vehicle?
I you really want to clear it, look for a wire plug with 2 leads inside that is missing a shorting plug, then go to the junk yard and get one to fill the hole.

Dialtone

May 2, 2002 | 03:35 PM

gloughe

Thread Starter

New User

Joined: Apr 2002

Posts: 2

Likes: 0

Error code 341

I do get some pinging at times. Mild though. I use 87 octane. I don't seem to get the same gas mileage as I use to. On the open road 19-20 miles to the gallon was normal now it's 17-18.

May 4, 2002 | 09:25 PM

thelonerangerxlt

Posting Guru

Joined: Aug 2000

Posts: 1,984

Likes: 2

Error code 341

The "octane reduction plug" if removed, retards the timing 2-3 degrees, and allows the use of lower octane fuel. At least that's the way it works on my 92 Mustang. I pulled the plug out, and stopped the pinging on mine. There was no change in mpg that I could tell.