I keep getting OBD codes 0171 & 0174 on my Jag X Type 2.5 Sport. It runs fine for a while if you cancel the codes but after a while if you try to accelerate it loses power at around 2500 rpm. Any idea

Asked by Dec 16, 2015 at 06:42 AM about the 2002 Jaguar X-TYPE 2.5

Question type: Maintenance & Repair

OBD codes 0171 & 0174 left & right bank too lean. Changed MAF sensor,
checked for vacuum leaks no hissing or sucking sounds, no obvious holes. If
you delete the codes she runs fine, sometimes all day other times for a few
miles, but then she'll start to lose power above 2-2500rpm. Usually does this
after running for a sustained period in slow traffic. Any suggestions please?

1 Answer

75,585

So, you can't go by sound or visual on this. Take some carburetor cleaner and spray along the matting surface of the intake and heads, The rpm will pick-up if there is a vacuum leak. Spray the carb cleaner anywhere there is vacuum. Lean condition is cause by too much air being drawn into the cylinders.

3 of 3 people found this helpful.

Your Answer

Jaguar X-TYPE Experts

  • #1
    Tom Demyan
    Reputation
    1,800
  • #2
    Raihan Ahmed
    Reputation
    780
  • #3
    superdiver
    Reputation
    490
View All

Related Models For Sale

Used Jaguar XJ-Series
53 Great Deals out of 2,334 listings starting at $1,650
Used Jaguar S-TYPE
10 Great Deals out of 392 listings starting at $1,900
Used Jaguar XK-Series
35 Great Deals out of 627 listings starting at $5,500
Used Jaguar XJR
95 listings starting at $6,995
Used Mercedes-Benz C-Class
795 Great Deals out of 29,389 listings starting at $1,500
Used Mercedes-Benz E-Class
668 Great Deals out of 22,165 listings starting at $1,500
Used BMW 3 Series
1,084 Great Deals out of 34,190 listings starting at $1,000
Used BMW 5 Series
503 Great Deals out of 15,806 listings starting at $1,500
Used Mercedes-Benz S-Class
165 Great Deals out of 7,691 listings starting at $2,000
Used Audi A4
308 Great Deals out of 12,387 listings starting at $1,899
Used Ford Mustang
567 Great Deals out of 36,996 listings starting at $2,595

Used Cars For Sale

2005 Jaguar X-TYPE 2.5 For Sale
2 listings starting at $5,246

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.