CEL after Oil Change
#1
Lexus Test Driver
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CEL after Oil Change
I just cant win lol. So today I changed my oil and filter for the first time since I got the car in late July...........the oil was blacker than black, but thats besides the point right now.
So all is fine all day long, I drove my car about 30 miles parked it and went to watch the white sox for a few hours. So about a half hour ago I head outside to go to subway and all is still fine.........about 3 miles down the road my CEL pops on So tomorrow Im going to head to autozone and see what the deal is. I'm just curious if this has happened to anyone else.
The really odd thing is the car is running the best since I got it. For the first time the car was shifting at the right points and felt like it had power..................then the damn cel pops on
So all is fine all day long, I drove my car about 30 miles parked it and went to watch the white sox for a few hours. So about a half hour ago I head outside to go to subway and all is still fine.........about 3 miles down the road my CEL pops on So tomorrow Im going to head to autozone and see what the deal is. I'm just curious if this has happened to anyone else.
The really odd thing is the car is running the best since I got it. For the first time the car was shifting at the right points and felt like it had power..................then the damn cel pops on
#4
Lexus Test Driver
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5.5qts as the the manual says...........yeah I'm starting to think its a coincidence as well, I will have autozone read the codes for me tomorrow. I'm hoping for the best
#5
Lexus Champion
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If you don't have any performance issues then i think that it might be P0420 reduced catylist efficiency. Just a wild guess, but I've seen it a couple of times before and won't effect overall performance, just emissions. Had that twice on my car, and simply reset the ECU and never came back. Don't reset your computer until you find out though. And don't ask the Autozone guy/gal what could be wrong they are paid to scan cars not to diagnose car trouble. Trust me
Last edited by StiCk3; 10-01-08 at 09:38 AM.
#6
Lexus Test Driver
Thread Starter
Ok so its a p0135 DTC P0135 Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1), where is this located? I think its on the drivers side but im not sure. I guess this was in there to begin with because there was a pending code and it was the same same one.
Can this effect the performance of the car or it is just emissions?
Can this effect the performance of the car or it is just emissions?
#7
Lexus Test Driver
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#8
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Ok so its a p0135 DTC P0135 Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1), where is this located? I think its on the drivers side but im not sure. I guess this was in there to begin with because there was a pending code and it was the same same one.
Can this effect the performance of the car or it is just emissions?
Can this effect the performance of the car or it is just emissions?
When i get the chance ill run through how to test it properly with a simple volt meter.
#10
Lexus Test Driver
Thread Starter
Thanks guys, I found the sensors on the manifolds after I posted this up. I tested it with my OHM meter and it is completely dead, so it looks like I'm going to be replacing it.
Does this really effect performance or just emissions?
Does this really effect performance or just emissions?
#11
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not performance neccerly, wont go into closed loop, just ****ier gas milage
#13
Lexus Test Driver
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I'm not sure what the ECU logic is with a dead o2 heater but, the purpose of the heater is to warm up the sensor faster on a COLD engine. O2 senors are more accurate when hot so a heater is put in so that the engine can go into closed loop faster.
Just a guess, with the dead o2 heater, the ECM will not run closed loop until the engine coolant temp hits x degrees.
DO IT!!!!
KC
Just a guess, with the dead o2 heater, the ECM will not run closed loop until the engine coolant temp hits x degrees.
Originally Posted by StiCk3
Contemplating a plan...
KC
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