• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

P0174 P0171

  • Thread starter Thread starter COBRA#3452
  • Start date Start date Apr 8, 2005
C

COBRA#3452

New Member
Dec 13, 2004
2
0
0
Apr 8, 2005
#1
  • Apr 8, 2005
  • #1
I have a 1997 cobra with

bassani o/r x pipe
mac catback
steeda timing adjuster
4:30 gears

the codes have been coming up for months now. i took it to the shop and they put in new intake gaskets, fuel pump, fuel pump relay, ccr module, iac valve, and mass air flow sensor.

i replaced both o2 sensors and cat sensors and the light still comes on.
the car idles low and will stall sometimes. any help would be great
 

sgarlic

Founding Member
Apr 21, 2001
3,085
1
56
Apr 9, 2005
#2
  • Apr 9, 2005
  • #2
For both your codes (which I'm sure you are aware, mean you're too lean discovered by bank 1 and bank 2)

Things to check listed in the book:

Excessive or low fuel pressure, leaking/contaminated fuel injectors, leaking fuel pressure regulator, air leaks after the MAF, vacuum leaks, pcv system, improperly seated oil dipstick, leaky egr gasket, stuck egr valve, leaking diaphragm, oil overfill, cam timing, cylinder compression, exhaust leaks before or after the pre-cat o2's.
 
You must log in or register to reply here.

Similar threads

Tuners come on inside
  • squeak93
  • Feb 13, 2026
  • SVT Tech Forum
Replies
1
Views
217
SVT Tech Forum Feb 20, 2026
squeak93
0
'04 V6 running rich excessively on both banks
  • 04DSGVert
  • Oct 26, 2025
  • SN95 V6 Mustang Tech
Replies
2
Views
300
SN95 V6 Mustang Tech Oct 27, 2025
04DSGVert
0
G
Sputtering/misfiring below 2500rpm
  • Godless
  • Sep 14, 2025
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
5
Views
332
2005 - 2014 S-197 Mustang -General/Talk- Sep 14, 2025
gkomo
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
720
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
G
2006 Mustang GT o2 Sensor Wiring Issue Car Bogging/Choking
  • GCantero93
  • Sep 5, 2025
  • 2005 - 2009 Specific Tech
Replies
4
Views
815
2005 - 2009 Specific Tech Sep 6, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?