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Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: jcassity on December 02, 2015, 11:08:26 AM

Title: code 41
Post by: jcassity on December 02, 2015, 11:08:26 AM
anyone ever had to struggle with clearing eec code 41?

yes it could be a dirty 02,,, shop manual indicates I may be running lean as well.
Fuel pres is fine under load and in park.. I did not test fuel pressure while driving though because I haven't modified my tester to make the hose longer.
Title: code 41
Post by: Aerocoupe on December 02, 2015, 04:08:32 PM
If possible have you swapped the O2's from right to left to see if the code follows the HEGO?

Darren
Title: code 41
Post by: thunderjet302 on December 02, 2015, 04:10:35 PM
Quote from: Aerocoupe;452724
If possible have you swapped the O2's from right to left to see if the code follows the HEGO?

Darren

Try this first. If the code follows the HEGO just get a new one (or pair).
Title: code 41
Post by: jcassity on December 02, 2015, 06:20:50 PM
well, the code 41 I look up in the shop manuals don't tell me "which one"..
Title: code 41
Post by: Aerocoupe on December 02, 2015, 06:36:06 PM
Is the car a V8?

Darren
Title: code 41
Post by: thunderjet302 on December 02, 2015, 07:03:55 PM
Quote from: jcassity;452736
well, the code 41 I look up in the shop manuals don't tell me "which one"..

41 - System Indicates Lean -passenger side(KOER), No o2 Sensor Switching Detected. always lean -passenger side(M)
Title: code 41
Post by: Haystack on December 02, 2015, 09:40:32 PM
I had this problem when i still had emissions testing when i still lived in the city. At a higher idle it went away, so i just raised the idle.

Few weeks ago my car started running like . I got o2's map sensor and tps. After replacing the map sensor it ran normally and o2 codes went away.
Title: code 41
Post by: jcassity on December 02, 2015, 10:59:40 PM
Quote from: thunderjet302;452743
41 - System Indicates Lean -passenger side(KOER), No o2 Sensor Switching Detected. always lean -passenger side(M)


your right,, it does
I missed that.
Title: code 41
Post by: jcassity on January 19, 2016, 10:32:58 PM
o2 sensors totally fixed the several year long intermittent bucking !!!!!!!!!!!!!!  excellent.

now problem 2,, I actually have to install them in the pipes

thanks
Title: code 41
Post by: thunderjet302 on January 27, 2016, 03:43:50 PM
Quote from: jcassity;453435
o2 sensors totally fixed the several year long intermittent bucking !!!!!!!!!!!!!!  excellent.

now problem 2,, I actually have to install them in the pipes

thanks

How did it fix the issue if the oxygen sensors aren't in the exhaust?
Title: code 41
Post by: jcassity on February 02, 2016, 12:50:45 AM
bucking is gone,, something changed.  makes no sense to me other than these are clean and the others are probably dirty?
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