P1135 Code: Replace sensors in pairs??
#1
Intermediate
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P1135 Code: Replace sensors in pairs??
Got the P1135 code and I was able to remove the pre-cat sensor under the car. Lexux wants about $230 and I can get it online for about half that. The parts guy at Lexus suggested that I replace the other sensor (front of engine just off the exhaust manifold) at the same time because they usually fail at about the same time. He also said they are exactly the same sensor. I thought they were different. Any experience and thoughts on this??? I don't want to order the wrong parts but I think it does make sense to change them both.
2002 RX 157,000 miles
2002 RX 157,000 miles
#2
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Anything can happen, but I changed the rear one about 2 years ago and the car's been running fine (except for my transmission problem) w/o changing the front one. I would just change the rear and see what happens. My 2 cents.
#3
Yes, they are the same part. They used to be different parts when they had different length wiring harnesses to match factory install. For some reason (I assume just to reduce parts inventory) Toyota went to one part.
#4
Super Moderator
One thing I've said about A/F sensors is that sometimes after you replace one, the other one may give funny readings trying to stay in check, but that doesn't necessarily mean you should just get 2 right at the start. Wait to see what happens. I probably would replace both just because I get a bit **** about exhaust stuff in general, but that's just me, but I don't recommend that to anyone else
#5
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In my other car '96 Toyota Camry, I was cheap and didn't want to replace the o2 sensors, so I added STP fuel system cleaner to every tank, after 5 tanks, I never saw that CEL pop back up, and the resistance on the o2 sensor were perfect. And that was 3 years ago. Just a thought...
#6
Super Moderator
In my other car '96 Toyota Camry, I was cheap and didn't want to replace the o2 sensors, so I added STP fuel system cleaner to every tank, after 5 tanks, I never saw that CEL pop back up, and the resistance on the o2 sensor were perfect. And that was 3 years ago. Just a thought...
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ismike420
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07-18-14 06:48 AM