code 52 knock sensor can't pass emissions

mirage83 · 08-11-2009, 03:45 PM

You have two knock sensors on your Supra, both on the drivers-side of the engine block below the intake plenum. One is toward the front of the block, the other is partially hiding behind the starter. Your error code could by the KS itself or it could be because of bad wiring to the KS.

You can pick up some short wiring kits from Toyota which will work for your sensors and which might well solve your code 52. Can't remember the part # right off hand but I think it's for one of their pickups which uses the same KS. There's also a re-wire mod using coax which will fix bad KS wiring.

The sensors themselves you can get from Toyota or from someone on the forum most likely.

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08-11-2009, 03:45 PM	#6
mirage83 12psi boost Join Date: Feb 2007 Location: Georgia Posts: 359	You have two knock sensors on your Supra, both on the drivers-side of the engine block below the intake plenum. One is toward the front of the block, the other is partially hiding behind the starter. Your error code could by the KS itself or it could be because of bad wiring to the KS. You can pick up some short wiring kits from Toyota which will work for your sensors and which might well solve your code 52. Can't remember the part # right off hand but I think it's for one of their pickups which uses the same KS. There's also a re-wire mod using coax which will fix bad KS wiring. The sensors themselves you can get from Toyota or from someone on the forum most likely.