snow-board Posted January 21, 2005 Share Posted January 21, 2005 I have a 96 ES300 that is getting a check engine light for excessive flow. I changed the EGR and vacuum modulator (I got a used part) and cleaned the throttle body but I still get the excessive flow check engine light. Any other suggestions? Thanks Quote Link to comment Share on other sites More sharing options...
vcv10guy Posted January 21, 2005 Share Posted January 21, 2005 Have you reset the ECU? It could be that the fault code is still in the system and needs to be cleared. Reset the ECU and drive the car. If it comes back on then maybe it's the same problem as before (excessive egr flow) or another sensor has triggered a fault code. Check all of your hoses that go to the egr and modulator to make sure they aren't connected incorrectly. Quote Link to comment Share on other sites More sharing options...
snow-board Posted January 21, 2005 Author Share Posted January 21, 2005 Have you reset the ECU? It could be that the fault code is still in the system and needs to be cleared. Reset the ECU and drive the car. If it comes back on then maybe it's the same problem as before (excessive egr flow) or another sensor has triggered a fault code. Check all of your hoses that go to the egr and modulator to make sure they aren't connected incorrectly. ← I did reset the ecu by disconnecting the negative terminal for about a minute. Is there a better way? Quote Link to comment Share on other sites More sharing options...
vcv10guy Posted January 21, 2005 Share Posted January 21, 2005 Have you reset the ECU? It could be that the fault code is still in the system and needs to be cleared. Reset the ECU and drive the car. If it comes back on then maybe it's the same problem as before (excessive egr flow) or another sensor has triggered a fault code. Check all of your hoses that go to the egr and modulator to make sure they aren't connected incorrectly. ← I did reset the ecu by disconnecting the negative terminal for about a minute. Is there a better way? ← I thought it was longer to fully reset the ECU. Something like 30 minutes. I could be wrong though, somebody please correct me if I'm mistaken. To be on the safe side, I personally reset it longer than a minute. Have you had the check engine light diagnosed again to make sure it's not another fault code? Quote Link to comment Share on other sites More sharing options...
khhoang Posted January 21, 2005 Share Posted January 21, 2005 member blake918 had that cel 0402 before and finally solved it by changing his VSV. Before that He changed the EGR valve&modulator without success. Read this thread: http://us.lexusownersclub.com/forums/index...excessive++flow You may want to try other cleaning suggestions before replacing parts. Also, check your intake tube for cracks, pinholes, leaks. How's the car driving/idling? Any symptoms? Quote Link to comment Share on other sites More sharing options...
khhoang Posted January 21, 2005 Share Posted January 21, 2005 yea, keep your negative terminal disconnected for at least 10minutes Quote Link to comment Share on other sites More sharing options...
snow-board Posted January 21, 2005 Author Share Posted January 21, 2005 member blake918 had that cel 0402 before and finally solved it by changing his VSV. Before that He changed the EGR valve&modulator without success. Read this thread:http://us.lexusownersclub.com/forums/index...excessive++flow You may want to try other cleaning suggestions before replacing parts. Also, check your intake tube for cracks, pinholes, leaks. How's the car driving/idling? Any symptoms? ← Car is running pretty good, the only thing that I noticed is that it is shifting later than it should. I noticed that and then the check engine light came on for the first time. Quote Link to comment Share on other sites More sharing options...
JPI Posted January 22, 2005 Share Posted January 22, 2005 The EGR is stuck open. I would replace the entire EGR valve. Please use new lexus part. Typical problem on V6. JPI Quote Link to comment Share on other sites More sharing options...
asifkhaled03 Posted January 22, 2005 Share Posted January 22, 2005 member blake918 had that cel 0402 before and finally solved it by changing his VSV. Before that He changed the EGR valve&modulator without success. Read this thread:http://us.lexusownersclub.com/forums/index...excessive++flow You may want to try other cleaning suggestions before replacing parts. Also, check your intake tube for cracks, pinholes, leaks. How's the car driving/idling? Any symptoms? ← Car is running pretty good, the only thing that I noticed is that it is shifting later than it should. I noticed that and then the check engine light came on for the first time. ← Yes also check on your Mass Air Flow sensor,sometimes that go bad. My ES300 still running as new from the day one. Miracle! Quote Link to comment Share on other sites More sharing options...
snow-board Posted January 22, 2005 Author Share Posted January 22, 2005 The EGR is stuck open. I would replace the entire EGR valve. Please use new lexus part. Typical problem on V6. JPI ← Thanks for the reply, I appreciate it Quote Link to comment Share on other sites More sharing options...
snow-board Posted February 2, 2005 Author Share Posted February 2, 2005 The EGR is stuck open. I would replace the entire EGR valve. Please use new lexus part. Typical problem on V6. JPI ← Thanks for the reply, I appreciate it ← Well, I replaced the EGR with a new one and still get the excessive flow. A friend of mine said it could be the oxygen sensor but I would think that I would get a different error code. Any suggestions? Quote Link to comment Share on other sites More sharing options...
snow-board Posted February 2, 2005 Author Share Posted February 2, 2005 I have a 96 ES300 that is getting a check engine light for excessive flow. I changed the EGR and vacuum modulator (I got a used part) and cleaned the throttle body but I still get the excessive flow check engine light. Any other suggestions?Thanks ← Update: I replace the EGR valve with a new one and the same code is in -- excessive flow. Any suggestions? Quote Link to comment Share on other sites More sharing options...
blake918 Posted February 2, 2005 Share Posted February 2, 2005 Did you check the VSVs?? That's exactly what happened on my car-the dealer changed the egr valve, and two days later the cel came back. Quote Link to comment Share on other sites More sharing options...
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