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99 RX300 AWD 150k Knock Sensor Issue


VTRUN

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Thank you In advance.
I was getting limp mode with a knock sensor code. I replaced both the knock sensors and harness. Put it back together and the engine purs. A few whips around the block and it still purrs but I have a code for both sensors.
Also possibly related but not sure, it was slamming in second when taking it for the test run, prior to and during the codes arrival.
The knock sensors came off ebay. They are supposed to be and look like toyota parts. (I know ebay can be a miss at times)
I greatly appreciate your help, advise and insight.
Justin
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  • 2 weeks later...

Hey there! My experience with this is from replacing these sensors multiplie times on my 2000 ES300. Same engine as the RX300. Around how much were the sensors and harness? Genuine Denso sensors are around $100 to $150 depending on where you get them. I bought some on rock auto the first time around and a week after installing them it threw the knock sensor codes again. For sensors always ensure you are getting genuine denso.

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25 minutes ago, killshot4077 said:

Hey there! My experience with this is from replacing these sensors multiplie times on my 2000 ES300. Same engine as the RX300. Around how much were the sensors and harness? Genuine Denso sensors are around $100 to $150 depending on where you get them. I bought some on rock auto the first time around and a week after installing them it threw the knock sensor codes again. For sensors always ensure you are getting genuine denso.

Thank Tyler, The sensors were about $40 for the pair and same with the harness. Appreciate the advise. I'm taking a little vacation from working on this car, but in January, I think I'll give the proper sensors a round.

Cheers

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No problem! I had to order mine from the parts store that has a reputable supplier. They are pricey but it beats having to do the job a 3rd time! I was so bummed to have to replace the knock sensors again but atleast they should be good for a long while! The ES is almost at 300,000 miles. Just got a RX300 with 119,000 and I’m using the experience I have from the Es to maintain the Rx

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