Mechanics

HAVING CODE P0172, P0175

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.
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Deepakkhamba
December 10, 2011.



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.

Rivermikerat
Dec 10, 2011.
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

Rasmataz
Dec 10, 2011.
Hi,
How would I know, I need to change my fuel injector.

Tiny
Deepakkhamba
Dec 12, 2011.