Sup Mod keeping the peace
Joined: Dec 2004
Location: NJ (Philadelphia area)
The P0172 and P0175 codes are caused by the Fuel injection system running too rich. The FSM states the following:
• Fuel injection system does not operate properly.
• The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)
Air fuel ratio (A/F) sensor 1 malfunction.
Fuel injector(s) may be dirty or leaking.
Exhaust gas leaks.
Incorrect fuel pressure.
Mass air flow sensor (MAF) defective.
When you replaced the MAF, it's possible that you disturbed some other harness connectors. Check the connectors for tightness and oxidation on the pins.
KA-T for life, yo!