HAVING CODE P0172, P0175

  • Tiny
  • deepakkhamba
  • 2002 Chrysler Intrepid
  • 225,000 miles

I change both o2 sensor front and rear. Head gas kit. Fuel pressur is okey. Both cat is okey. Campsaft is working good.

Saturday, December 10th, 2011 AT 3:16 AM

4 Answers

  • Tiny
  • rivermikerat
  • Expert
  • 6,174 posts

P0172= 1/1 fuel system rich.
P0175= 2/1 fuel system rich.
You probably know this, but rich means too much fuel. Or, not enough air. When was the last time you changed the air filter?

I would suspect something like a leaking fuel injector or a faulty MAP sensor not generating a code. Check the plugs, coil(s), and wires.

Was this
answer
helpful?
Yes
No
Saturday, December 10th, 2011 AT 3:25 AM
  • Tiny
  • rasmataz
  • Member

1. Excessive fuel pressure can be cause by restricted fuel return line

2. Defective Oxygen Sensors.

3. Leaking injectors and fuel pressure regulator.

4. Coolant temperature sensor out of calibration.

5. Restricted air intake system

Was this
answer
helpful?
Yes
No
Saturday, December 10th, 2011 AT 3:33 AM
  • Tiny
  • deepakkhamba
  • Member

Hi,
How would I know, I need to change my fuel injector.

Was this
answer
helpful?
Yes
No
Monday, December 12th, 2011 AT 8:35 AM
  • Tiny
  • rasmataz
  • Member

Go to this link for more information: http://www.ecs.fullerton.edu/ sowell/jag/fuelingsys/testrig/InjectorTestRig.pdf

Was this
answer
helpful?
Yes
No
Monday, December 12th, 2011 AT 9:46 AM

Please login or register to post a reply.

Similar Questions