Problem with my 1997 Oldsmobile Aurora,4.0
The "service engine soon" light is on. Sometimes it turns off but only
for about 5 miles and then comes on again. I used a computer reader and
I found 4 codes :
P0404 P0300 P1645 and P0404 again.
I put an injector cleaner
in my fuel and now I'm thinking to replace the EGR valve .
do you think that is going to solve my problem or what else should I do?
I'm also running out of time because in about 2 weeks I have to do the
emission test on my car.
I would really apreciate your advice.
thank you.
JK:
OK, lets go one at a time. First check ALL fuses underhood and in the fuse block
under the rear seat.
P0300 misfire. Need to find out which cylinder. You need to see live data for that. A
code reader cannot do that. 4.0l v8 are well know for corroded ignition coil towers.
Just pull plug wires off coils one at a time and look for corrosion on coil and wire. Also
could be a burned plug wire at the spark plug. The ones in the back are usually the
culpret.
P0404 is EGR pintle open position error. The pcm(computer) is not seeing the
correct feedback position. Either egr is bad, or just full of carbon. Could try to remove
valve, tap on the ground to clean out any carbon. or use compressed air. since it
came up twice, sounds like it is current and history code.
P1645 is the evap system purge control valve circuit. Possible bad solenoid, or
connection problem. If you can use a volt/ohm meter, check for 12 volts at pink wire
to make sure you have correct voltage in.
The problem is; how long have these or some been there, or did they all come at the
same time. If happened after radiator replacement, then would suspect a harness got
moved or pulled causing a loose connection.
Aside from all these things, some normal places of poor connection/broken wires is
the harness going into the firewall below and toward the pass. side of the master
cylinder. Clear all codes and grab and move that and other harness to see if that
causes the light to come on. The egr wires, evap. solenoid wires, and injector wires
all go in that harness and travel under the throttle body. It is possible that these are
all or some related. That was a common problem area.
If you are familiar with auto repair, could do some of these things yourself, if not,
would suggest a good repair facility, since there are several things, different systems
having problems. Over the years have had any one of these parts go bad (egr valve,
purge solenoid, coils, wires, plugs, injectors)Let me know if i can be of more
assistance.
The "service engine soon" light is on. Sometimes it turns off but only
for about 5 miles and then comes on again. I used a computer reader and
I found 4 codes :
P0404 P0300 P1645 and P0404 again.
I put an injector cleaner
in my fuel and now I'm thinking to replace the EGR valve .
do you think that is going to solve my problem or what else should I do?
I'm also running out of time because in about 2 weeks I have to do the
emission test on my car.
I would really apreciate your advice.
thank you.
JK:
OK, lets go one at a time. First check ALL fuses underhood and in the fuse block
under the rear seat.
P0300 misfire. Need to find out which cylinder. You need to see live data for that. A
code reader cannot do that. 4.0l v8 are well know for corroded ignition coil towers.
Just pull plug wires off coils one at a time and look for corrosion on coil and wire. Also
could be a burned plug wire at the spark plug. The ones in the back are usually the
culpret.
P0404 is EGR pintle open position error. The pcm(computer) is not seeing the
correct feedback position. Either egr is bad, or just full of carbon. Could try to remove
valve, tap on the ground to clean out any carbon. or use compressed air. since it
came up twice, sounds like it is current and history code.
P1645 is the evap system purge control valve circuit. Possible bad solenoid, or
connection problem. If you can use a volt/ohm meter, check for 12 volts at pink wire
to make sure you have correct voltage in.
The problem is; how long have these or some been there, or did they all come at the
same time. If happened after radiator replacement, then would suspect a harness got
moved or pulled causing a loose connection.
Aside from all these things, some normal places of poor connection/broken wires is
the harness going into the firewall below and toward the pass. side of the master
cylinder. Clear all codes and grab and move that and other harness to see if that
causes the light to come on. The egr wires, evap. solenoid wires, and injector wires
all go in that harness and travel under the throttle body. It is possible that these are
all or some related. That was a common problem area.
If you are familiar with auto repair, could do some of these things yourself, if not,
would suggest a good repair facility, since there are several things, different systems
having problems. Over the years have had any one of these parts go bad (egr valve,
purge solenoid, coils, wires, plugs, injectors)Let me know if i can be of more
assistance.
Oldsmobile Aurora OBD2 Scan Codes P0404 P0300 P1645 P0404
Check engine light - Also known as the SERVICE ENGINE SOON or SES light. This indicates a malfunction in
the engine control and emissions systems of your car. Step by step instructions on how to do a simple scan to
check for computer trouble codes. These codes give an indication as to what system is having a problem.
the engine control and emissions systems of your car. Step by step instructions on how to do a simple scan to
check for computer trouble codes. These codes give an indication as to what system is having a problem.
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