Whats the difference in the 2 lamba sensors

1. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #1 19th May 2010, 12:28

   I have problems with my engine running correctly, I have changed the ICV, Map sensor, Temp sensor. All about 2 months ago so its not those. Im thinking it could be the lamba sensors, one of mine is in my 4-2-1 manifold, and the other is capped off. The engine management light has been on but went off a week ago. Just wondering what the difference is as i dont want to replace both if i can help it.
2. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #2 19th May 2010, 12:31

   Change the one which was originally before the CAT, i.e. the one that's screwed into the exhaust.

   1 user thanked this post: BobCm
3. user_31895 Frequent Poster Joined: Mar 2009 Milton Keynes Posts: 601 Polar white VTS Fixed for the 2nd time!

   #3 19th May 2010, 12:31

   i have been having problems with mine running. i had a fuel trim fault apprently, my friend who did the diagnostics said the front lambda controls the air/fuel ratio, and the 2nd one gives feedback to the ecu on how the first lambda is working so it can run more efficiently- i think thats what he said! im about to replace my front lambda as on the diagnostics it shows what each sensor is doing and mine wasnt doing anything lol
4. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #4 19th May 2010, 12:34

   The second lambda does jack - just tells the ECU whether the CAT is working to an 'efficient' level or not. If it isn't, the engine light comes on the dash.
   
   Mine still comes on occasionally - sleeving the second lambda isn't a bulletproof solution. Doesn't make any difference to how the car runs though.

   1 user thanked this post: BobCm
5. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #5 24th May 2010, 20:22

   Right so its the one that now screws into my manifold, not the one i have sleeved. cheers
6. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

   #6 24th May 2010, 20:27

   i dont even have a lambda sensor and the car works fine
7. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #7 24th May 2010, 21:38

   Quote:

   Originally Posted by DJDannyB Right so its the one that now screws into my manifold, not the one i have sleeved. cheers

   Yip, the one you want to renew is the one that should be screwed into your manifold at present.
   
   

   Quote:

   Originally Posted by jeffchiz i dont even have a lambda sensor and the car works fine

   It does run without a lambda, but the fuel trims aren't 'fine tuned' from their defaults. I'd certainly be looking at fitting one.

   2 users thanked this post: DJDannyB, BobCm
8. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #8 25th May 2010, 12:45

   Cheers mate!
   
   And yeah dont run your car without a sensor.. its there for a reason..