Codes PO 115 and PO 400

Asked by PatBall Jan 11, 2014 at 03:55 PM about the 1999 Mazda Millenia 4 Dr STD Sedan

Question type: Maintenance & Repair

1 Answer

44,715

The P0400 has to do with a fault in the EGR (Exhaust Gas recirculation) system. The possible cause is leak or blockage, wiring, EGR Valve or EGR solenoid or the ECM. P0115 has to do with the ECT (Engine coolant sensor) possible causes for this fault is wiring or the Engine coolant sensor itself or the ECM

2 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Steven Cisneros
    Reputation
    990
  • #2
    WIZARD2323
    Reputation
    550
  • #3
    Keith12345
    Reputation
    470
View All

Find great deals from top-rated dealers

Search

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.