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Go through the following and see if you need help on any of the procedures.
If DTC P0172 (system too rich) is set, check for:
Fuel pressure regulator clogged or stuck closed.
Clogged fuel return line.
A leaking fuel injector.
Fuel octane level less than specification.
A deteriorated primary HO2S-1.
Insufficient EGR system flow (D16Y5 engine).
A leaking or stuck open EVAP purge control solenoid valve.
Valves incorrectly adjusted.
Honda does not use MAF. A MAP sensor is used and is attached to the top of the throttle body. The item plugged into the air intake hose is the Intake Air Temperature sensor.
Wednesday, June 3rd, 2009 AT 2:14 PM