Lambda showing 1.999 - Peugeot Forums
Peugeot Forums - Peueot - Citroen Community
Home :: Peugeot Forums :: Rules :: Articles :: About Us :: Partner Vendors :: Advertise


Go Back   Peugeot Forums > Peugeot Models > 207
PeugeotForums.com is the premier Peugeot All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 19-10-17, 07:51 AM   #1
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

Hello everyone,

We have a 207 sw 1.4 vti 16v 95 hp,
The problem is that the car is running rich with a very poor milage, also it has black smoke,

I have attatched my obd scanner and got the code:

P2246 - O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1

The fuel system is open due to fault code,
If I clear the code then start the car I get Lambda 1.999, then after a while I get a pending DTC P2246,

The strange thing is that when I power cycle the engine after the code is stored, Lambda reads between 0.98 and 1.00 or so,

If I clear the code again, the scenario starts all over again and Lambda reads 1.999,

Is Lambda 1.999 indicating a massive air in the mixture, or is it an ECU issue?

The Lambda sensor (Bosch Lsu 4.9) was fitted new recently,

I am out of ideas,
Thanks.

Last edited by kamelbox; 21-10-17 at 08:21 PM.
kamelbox is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 19-10-17, 10:27 AM   #2
Senior Member
 
Join Date: Apr 2014
Location: west midlands
Posts: 806
Default

only thing i can add is to check you have no air in coolant, bleed the system use the bleed cap and squeeze pipes with engine running and warm.

think you may need it on pp2000/lexia diagnostic.
stripe88 is offline   Reply With Quote Quick reply to this message
Old 19-10-17, 10:45 AM   #3
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

I will check air in coolant, BTW all those tests are performed when the engine is fully warmed at arround 90 degrees celcius

I have already read the code with pp2000, same code every time, also monitored Lambda signal it showed a high voltage arround 2000mv or 3000mv I don't remember the exact value,

I have read on internet that updating ECU at the dealer solves a lot of problems on those engines, however the dealer was a bit worried if the update hangs in the middle it could cause the car not starting at all.
kamelbox is offline   Reply With Quote Quick reply to this message
 
Old 19-10-17, 07:16 PM   #4
Senior Member
 
Join Date: Apr 2014
Location: west midlands
Posts: 806
Default

before going any further, check the fusebox and ecu plugs/sockets for any sign of corrosion or damp.(undo a battery lead and unplug them all)
after that think i would be looking for a cheap used lambda just for diagnostic and to rule out duff replacement.
stripe88 is offline   Reply With Quote Quick reply to this message
Old 19-10-17, 07:50 PM   #5
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

Hello stripe88, thank you for your reply,

ECU plugs are like new, also fusebox under the hood as well as under steering wheel look clean,

I may try an used sensor,
Also I may insist for an unpade at the dealer,
kamelbox is offline   Reply With Quote Quick reply to this message
Old 21-10-17, 06:05 PM   #6
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

I've checked, there's no air in coolant.
kamelbox is offline   Reply With Quote Quick reply to this message
Old 21-10-17, 08:06 PM   #7
Senior Member
 
Join Date: Apr 2014
Location: west midlands
Posts: 806
Default

strange, the daughter drove through a deep puddle and looks like she has destroyed her post cat lambda, i am getting 5 02 codes which wont reset for long.

off to ebay i go.
stripe88 is offline   Reply With Quote Quick reply to this message
Old 21-10-17, 08:17 PM   #8
Senior Member
 
Join Date: Oct 2012
Location: falkirk
Posts: 14,179
Default

Its not a BMW engine its a peugeot engine built in france with SOME BMW input but it is built by peugeot used by BMW.

Too many people say its BMW and its not nor is the diesel in the mini it is peugeot too
__________________
assume nothing check everything twice !!
reliable406 is offline   Reply With Quote Quick reply to this message
Old 21-10-17, 08:24 PM   #9
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

Thanks stripe88, I think I should try another Lambda sensor like you said,

Thanks reliable406, post updated
kamelbox is offline   Reply With Quote Quick reply to this message
Old 29-01-18, 09:27 AM   #10
Junior Member
 
Join Date: Oct 2017
Posts: 6
Default

Hello again,
Issue solved, we fitted a used kit (BSI, ECU, Keys), now lambda values are read correctly, black smoke gone, idle is smooth and fuel cosumption is back to normal.

So definitely the old ECU had a hardware defect that caused Lambda sensor not being probed, I have looked on the old ECU's Circuit Board but no sign of damage.

Thank you all
kamelbox is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Peugeot Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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. The time now is 06:58 PM.



Powered by vBulletin® Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.