Check engine light indicates faulty EGR valve (code P0400). How difficult would it be to replace. Shop wants $500 plus ($300 part, $200 labor).
Take off your EGR valve and clean it out with carb cleaner also
grease tyhe little screw thing in it,,, u will c what i mean if u take it apart. carbon builds up in the chamber. it is located at the back left side of your engine and is a bit of a pain to take off. this should save u the cost except for the cleaner and labor. i had the same problem cheapest i found was 90$ on ebay.
Found one on Ebay (used but fully tested with a 1 yr warranty) for $50.00
Was told by local mechanic to spray for a couple of days with a lubricant like PB Blast or the like to loosen the two bolts
That sounds like a lot. The part should be only $50 or so. Check with some other repair shops.
Knock Sensor Circuit
Malfunction
What does that mean?
A knock sensor tells the engine
computer when one or more of your engine's cylinders are "knocking", that is,
exploding the air/fuel mixture in a way that delivers less power and can
be damaging to the engine if prolonged. The computer uses this information to
tune the engine so that it doesn't knock. If your knock sensor
wasn't operating properly, so that it was always indicating a knock, the engine
computer's response may have been to change the ignition
timing on your engine. Knock sensors generally bolt into or thread into the
engine block. This P0325 code
may show up intermittently or the Service Engine light may be lit constantly.
Other knock sensor related DTC codes include P0330.
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Symptoms
You may notice drivability problems
including a lack of power and perhaps some hesitation. There may also be other
symptoms.
Causes
A code P0325 most likely means one or more of the following has
happened:
Sources: W. Farmer - Nissan
P0400 - Exhaust Gas Recirculation Flow Malfunction OBD-II Trouble Code Technical Description
Exhaust Gas Recirculation Flow
Malfunction
What does that mean?
The exhaust gas recirculation (EGR) valve
is vacuum controlled valve that regulates the amount of exhaust gases that
re-enter the cylinders. The powertrain control module (PCM) determines how much
based on engine load,
temp, and other conditions. If the PCM detects that the amount of exhaust gases
entering the cylinder were insufficient or non-existent, this code is set.
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Symptoms
No symptoms will likely be noticed by the
driver other
than the MIL (malfunction indicator lamp). However, non visible symptoms will be
increased combustion temperature and increased Nox emissions.
Causes
A code P0400 may mean that one or more of
the following has happened:
Since EGR valve designs are different, no
one test will suffice:
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Check many online parts sites... best price for the EGR I could was $235. $200 labor is high but about the min you get for driving the car into the repair bay
I have the same problem. i was wondering what website you found the cheapest valve at? Did you try to clean it?
check engine soon light came on and when checked code was p0404
reset computer check engine light keeps coming on when you let off gas going down hill
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