Impertinent CEL P0400 99 OBW

J

John Hansen

99 OBW

I am not sure if this is anything to worry about, but I have situation
where my CEL comes on with a P0400 code. This is related to the ERG
system, but after having it checked out by the dealer with no
conclusion he cleared the code, charged me $70.00 and sent me on my
way. Well needless to it came back and again was a P0400 code. I
paid no attention to knowing what is was but then it cleared on its
own, then it came back, then is cleared on its own, then came back,
then cleared….currently out.

This all started when I hit a tire tread on the interstate at 65 mph
and worked its way under the car smashing in the panel protecting the
drive shaft at the rear part. No real damage, but I know the O2
sensor is located at the front the shaft. I know this may sound
strange but it cleared after the oil was changed, then just yesterday
after I filled up with gas..I know these have nothing to do with each
other, but trying to give an much information as possible.

Anyway, are their any thoughts as what to do, other than giving an
deal huge sums of money to resolve since there are lots are places to
look.
 
Here is the description. Maybe exhaust pipe cracked when hitting the tire or
the ERG valve, maybe build up from carbon as been discussed in the group
before.

Blair

P0400
Exhaust Gas Recirculation Flow Malfunction
 
(John said:
This all started when I hit a tire tread on the interstate at 65 mph
and worked its way under the car smashing in the panel protecting the
drive shaft at the rear part. No real damage, but I know the O2
sensor is located at the front the shaft. I know this may sound
strange but it cleared after the oil was changed, then just yesterday
after I filled up with gas..I know these have nothing to do with each
other, but trying to give an much information as possible.

Anyway, are their any thoughts as what to do, other than giving an
deal huge sums of money to resolve since there are lots are places to
look.

There's a longer, Federally-mandated warranty on
emissions parts...you may still be covered by it.
 
Poor gas cap seal will cause a cel. I would also check the charcoal
canister and associated hoses under the back of the vehicle.
 

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