98 LS400 Check engine- P0135 P0305 P0430
11-15-16, 07:14 AM
#1
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98 LS400 Check engine- P0135 P0305 P0430
Hi Lexus gang,
My LS showing up check engine light. upon scanning the following codes came up.
P0135
P0305
P0430
How do we fix them. Also sometimes while going to the speed of 80km/h car jerks a bit.
My LS showing up check engine light. upon scanning the following codes came up.
P0135
P0305
P0430
How do we fix them. Also sometimes while going to the speed of 80km/h car jerks a bit.
Last edited by RA40; 11-15-16 at 10:44 AM. Reason: title adjustment
11-15-16, 09:05 AM
#2
Quite a varied list. The P0430 is a catalyst inefficiency code on the bank two side. Quite often a leak on the rear flange on the passenger side cat. The P0135 is a code for the bank one first oxygen sensor 1 on the bank 1 side. The P0305 is a misfire code on the #5 cylinder(bank 1- third cylinder up on the right hand side of the car as you are staring at it). Could be plug/wire related. Could also be a fuel injector on that cylinder. So looks like you have at least two issues.
Last edited by jaaa; 11-15-16 at 09:24 AM.
11-15-16, 09:54 AM
#3
I've seen the p0135 on my 98 related to the o2 sensor... I believe the 0430 and the p0135 are related as they're both related to the exhaust gas. And could be triggered by the misfire on #5 cylinder.
Could be you fix the misfire issue and the other two get resolved because of that.
So going to ask.. what type/quality of gas to you use? Are you burning regular or premium? Are you purchasing top tier gas or low grade discount gas as cheap as you can find it?
My story...
I believe that the o2 sensors ability to function degrades over time....
I loaned my 98 to my son for about 6 months... when I got it back it had the P0135 code on it.
He used low grade, regular gas in the car.
I cleared the code, added some seafoam and started using top, tier premium gas in it and put a couple of thousand miles on it since I got it back.
6 months later that code has not returned and the car drives great.
I did not have the misfire code as you do, so that still may be the culprit for your 3 codes as it would occur first in the firing/exhaust sequence. One of the causes of the p0305 code is a faulty o2 sensor also.
I do believe that as the car's age and the sensors degrade, their ability to handle gas they weren't designed is reduced.
Could be a change in gas with a little cleaning could go a long way to quickly solving this problem. Good luck.
Could be you fix the misfire issue and the other two get resolved because of that.
So going to ask.. what type/quality of gas to you use? Are you burning regular or premium? Are you purchasing top tier gas or low grade discount gas as cheap as you can find it?
My story...
I believe that the o2 sensors ability to function degrades over time....
I loaned my 98 to my son for about 6 months... when I got it back it had the P0135 code on it.
He used low grade, regular gas in the car.
I cleared the code, added some seafoam and started using top, tier premium gas in it and put a couple of thousand miles on it since I got it back.
6 months later that code has not returned and the car drives great.
I did not have the misfire code as you do, so that still may be the culprit for your 3 codes as it would occur first in the firing/exhaust sequence. One of the causes of the p0305 code is a faulty o2 sensor also.
I do believe that as the car's age and the sensors degrade, their ability to handle gas they weren't designed is reduced.
Could be a change in gas with a little cleaning could go a long way to quickly solving this problem. Good luck.
11-15-16, 12:22 PM
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Join Date: May 2015
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I've seen the p0135 on my 98 related to the o2 sensor... I believe the 0430 and the p0135 are related as they're both related to the exhaust gas. And could be triggered by the misfire on #5 cylinder.
Could be you fix the misfire issue and the other two get resolved because of that.
So going to ask.. what type/quality of gas to you use? Are you burning regular or premium? Are you purchasing top tier gas or low grade discount gas as cheap as you can find it?
My story...
I believe that the o2 sensors ability to function degrades over time....
I loaned my 98 to my son for about 6 months... when I got it back it had the P0135 code on it.
He used low grade, regular gas in the car.
I cleared the code, added some seafoam and started using top, tier premium gas in it and put a couple of thousand miles on it since I got it back.
6 months later that code has not returned and the car drives great.
I did not have the misfire code as you do, so that still may be the culprit for your 3 codes as it would occur first in the firing/exhaust sequence. One of the causes of the p0305 code is a faulty o2 sensor also.
I do believe that as the car's age and the sensors degrade, their ability to handle gas they weren't designed is reduced.
Could be a change in gas with a little cleaning could go a long way to quickly solving this problem. Good luck.
Could be you fix the misfire issue and the other two get resolved because of that.
So going to ask.. what type/quality of gas to you use? Are you burning regular or premium? Are you purchasing top tier gas or low grade discount gas as cheap as you can find it?
My story...
I believe that the o2 sensors ability to function degrades over time....
I loaned my 98 to my son for about 6 months... when I got it back it had the P0135 code on it.
He used low grade, regular gas in the car.
I cleared the code, added some seafoam and started using top, tier premium gas in it and put a couple of thousand miles on it since I got it back.
6 months later that code has not returned and the car drives great.
I did not have the misfire code as you do, so that still may be the culprit for your 3 codes as it would occur first in the firing/exhaust sequence. One of the causes of the p0305 code is a faulty o2 sensor also.
I do believe that as the car's age and the sensors degrade, their ability to handle gas they weren't designed is reduced.
Could be a change in gas with a little cleaning could go a long way to quickly solving this problem. Good luck.
Hello,
I am living in Dubai and here we have three types 91, 95 and 98 octane levels. Ever since i have my Lexus with me i am using 95 type.
What should i do now to fix all the ECU codes coming up?
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