My Pilot's Check Engine Light is on and it gives a P2279 code when I check it. I have replaced the intake manifold gaskets and the injector base gaskets, but that hasn't worked. What else can I do?
Got 100k miles on it? ever run crappy fuel additives that can wreck a good 02 sensor?
LOTS ! if motivated. (are you asking for wild guessing?)
what engine size?
first off read the FSM , for your car and year. it covers this DTC.
P2279 intake leaks or PCV. it stated on 0bd2 scan code pages.
but in the FSM , there is far more, why not read that..???
it tells you the conditions before the test, and what it measure.
both are big clues to why?
the freeze frame , you didth post that,, it tells you all conditions
related to 2279, at the instant of failure.
1: speed, rpm,. and load.
2: in closed loop:
3: sensor reading an the one that was wrong.
you dont have a real scan tool or just useless code reader?
with the freeze frame in hand, id drive and log data.
my scan tool (scantool.net and palmer software) $200? investment. (paid back zillion times?)
i can log scan, driving and see all condition during the drive
before and after the 2279 (im assuming you reset it and it repeats per OBD2 protocols.)
my first test are like this.
1: engine warms fast to over 180F and holds. ECT reading, PIDS.
PIDS are live data from sensors. in full view
2: as it warms, parked, at idle my engine goes to closed loop real fast (by virtue of 02 heaters )
3: my engine is now 100% hot and fully warm and it idle
its in closed loop and the LTFT is at -4%
not -40 nor +40
the natural engine tune is 4%rich closed loop sucks out -4% to reach STOICH) if not a new 02 sensor at 100k miles. all this is whistling in the dark, if the 02 fibs and reads rich for STOICH
then it goes lean, or in your case, the O2 Fibs(old or poised)
the 02 reads lean and had to add tons of fuel to correct it.
i dont have a 2005 fFS to see 2279.
it will flat say something like, +35% LTFT (lean) trips 2279s.
my guess, is that 2279 is what I call the LTFT (rail fail)
all newer OBD2 cars have this RAIL fail trips
the EFI can control +(-) 40% more more, but over a lower number range it trips too rich or too lean , as an early warning.
I watch CLOSED loop like hawk , idling hot and med. speed driving hot engine, no hills. steady right foot , be darn sure
that CLOSE LOOP holds there?
if not fix idle CL bad first.
if not fix cruise CL bad next.
IMO , at 100k why not put in $20 O2 sensor, (ask for sources)
or splurge and buy the PNP BOSCH, at any store, just front sensor, not rear. (pnp is plug-n-play) just plugs in , no wiring as in my $20 cheap skate ways.
a bad PCV can be blocked, or stuck wide open.
or the PCV hose cracked sucking in lots of oxygen (illegal oxy btw on the vac side)
the PCV meters , (checkvalve and orifice) piston ring gasses (bypassed from the rings , products of combustion) so no air leaks or bad valve is allowed or idle air mix can be wrong.)
PCV can fail 3 ways, jammed check valve. stuck open, or air leaks. (all have bad consensuses, jammed causes oil leaks.)
many times, we get lean at idle, and can not find the air leak.
(shows a +30% LTFT)( long term fuel trim (trend))
and out comes the smoke machine, (great skills need to use it.
as some leaks are normal and others not, very hard)
i hope this helps. you. and others,
Sep 09, 2013 |
2005 Honda Pilot EX