Jump to content


Photo

Focus Mk1 2002 Engine Management Light Problem


  • Please log in to reply
3 replies to this topic

#1 GazM23

GazM23

    Newbie

  • New Member
  • Pip
  • 4 posts
  • Name: Gary
  • Ford Model: Focus
  • Year: 2002
  • Location: Nottinghamshire

Posted 26 June 2012 - 05:14 PM

Hi, Only joined the site today but I'm hoping you can offer me some much needed guidance here.
I bought my focus in March (2012), and after a couple of weeks suffered the annoying problem of the speed sensor failure, so the garage I bought it from kindly replaced the cluster and the speed sensor too. After a few more weeks the engine management light popped on, so took it to a couple of garages who tested it on a diagnostic machine showing the code 'Catalyst Efficiency Below Threshold', one garage immediately said they needed to change the CAT, but the second garage thought it only 'might possibly' be the CAT and so ran an emissions test on it. The car flew through the emissions test, and was told to run some Redex through it and get it serviced. The Engine Management light it still on and showing no signs of moving. The car runs totally fine, and every mechanic I take it to, hasn't the foggiest what it could be.

Ive read on another site that it could be a dodgy sensor??

Has anyone else come across anything like this or know what could be the solution for me please?

Have something to contribute?

Sign in or register to start a topic...



Sign up to FOC Premium Membership To Remove These Ads

#2 Stoney871

Stoney871

    Resident Peacekeeper

  • Super Mod
  • 18,088 posts
  • Name: Clive
  • Ford Model: 2015 Focus ST3 250BHP
  • Year: 2015
  • Location: Devon
Contributor

Posted 27 June 2012 - 09:48 AM

Try disconnecting the battery for 20 minutes to reset the ECU and then go for a good drive to recalibrate the system.
Make sure you have your radio code first though.

#3 DJ_Andy_M

DJ_Andy_M

    Feet Under The Table

  • Budding Enthusiast
  • PipPipPipPip
  • 148 posts
  • Name: Andy
  • Ford Model: Ford Focus MK2.5 Facelift Zetec
  • Year: 2008
  • Location: Hampshire

Posted 27 June 2012 - 12:24 PM

Hi, Only joined the site today but I'm hoping you can offer me some much needed guidance here.
I bought my focus in March (2012), and after a couple of weeks suffered the annoying problem of the speed sensor failure, so the garage I bought it from kindly replaced the cluster and the speed sensor too. After a few more weeks the engine management light popped on, so took it to a couple of garages who tested it on a diagnostic machine showing the code 'Catalyst Efficiency Below Threshold', one garage immediately said they needed to change the CAT, but the second garage thought it only 'might possibly' be the CAT and so ran an emissions test on it. The car flew through the emissions test, and was told to run some Redex through it and get it serviced. The Engine Management light it still on and showing no signs of moving. The car runs totally fine, and every mechanic I take it to, hasn't the foggiest what it could be.

Ive read on another site that it could be a dodgy sensor??

Has anyone else come across anything like this or know what could be the solution for me please?


Wouldn't it be ironic if it was my old 02 plate focus! I part-ex'd my focus estate around this time! That had the common focus speedo problem.

Read your other post about getting the codes cleared, and welcome! Post some pictures up of your car!

#4 GazM23

GazM23

    Newbie

  • New Member
  • Pip
  • 4 posts
  • Name: Gary
  • Ford Model: Focus
  • Year: 2002
  • Location: Nottinghamshire

Posted 30 June 2012 - 06:52 PM

Try disconnecting the battery for 20 minutes to reset the ECU and then go for a good drive to recalibrate the system.
Make sure you have your radio code first though.


Just tried this yesterday evening and took it for a good old drive. Thought it had done the trick but its just come back on. Would a faulty CAT still have pass the emissions test done a couple of weeks ago though? Any ideas where I should go from here?


Not what you're looking for?

Register now, we have a huge community of enthusiasts to answer any questions you might have



0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users