1997 Mazda Protege

1997 MAZDA PROTEGE
Avatar
SLIMGOODY2702
  • MEMBER
  • 1 POST
Other Category problem
1997 Mazda Protege 4 cyl Front Wheel Drive Automatic
----------------------------------------------------------------
getting Diagnostic Trouble Code po 140 and po400
what do i need to do to get this matter cleared up
Jan 11, 2008 at 11:34 PM
Advertisement
Avatar
BLACKOP555
  • CERTIFIED EXPERT
  • 10,386 POSTS
The code po140 is related to the 02 sensor on Bank 1 sensor #2 having no activity on that sensor.

it is probably going to have to be replaced.
do you have a catalytic converter?

P0400 is for the egr valve being open and the MAP not showing any change, you will have to take that in to a dealership as it is very hard to troubleshoot.
Jan 12, 2008 at 9:16 AM