tigerpilot Posted January 28, 2008 Share Posted January 28, 2008 Hi Folks... Need some help. Getting P0135. This indicates is a faulty O2 sensor, specifically, Heater Circuit Malfuntion. The O2 sensor in question is located at Bank 1 Sensor 1. Here's the question. My Lexus manual says it's the sensor located just behind the radiator in the exhaust manifold. (Super easy to get at.) Others say... This is the O2 sensor that is between the firewall and the engine. (Tough to get at.) I changed the one by the radiator with a "generic" sensor and after about 25 miles the CEL came back on. Do you think I changed the correct sensor and if so...are these generic sensors just 'junk?' Thanks.... Quote Link to comment Share on other sites More sharing options...
lexushead Posted January 29, 2008 Share Posted January 29, 2008 Hi Folks...Need some help. Getting P0135. This indicates is a faulty O2 sensor, specifically, Heater Circuit Malfuntion. The O2 sensor in question is located at Bank 1 Sensor 1. Here's the question. My Lexus manual says it's the sensor located just behind the radiator in the exhaust manifold. (Super easy to get at.) Others say... This is the O2 sensor that is between the firewall and the engine. (Tough to get at.) I changed the one by the radiator with a "generic" sensor and after about 25 miles the CEL came back on. Do you think I changed the correct sensor and if so...are these generic sensors just 'junk?' Thanks.... You changed the wrong one.. Bank 1=the bank 1 cylinder is on Bank 2=the bank 2 cylinder is on Regards, lexushead ASE/L1 Master Toyota Lexus Factory Certified Master www.toyautoservice.com Quote Link to comment Share on other sites More sharing options...
lexushead Posted January 29, 2008 Share Posted January 29, 2008 Hi Folks...Need some help. Getting P0135. This indicates is a faulty O2 sensor, specifically, Heater Circuit Malfuntion. The O2 sensor in question is located at Bank 1 Sensor 1. Here's the question. My Lexus manual says it's the sensor located just behind the radiator in the exhaust manifold. (Super easy to get at.) Others say... This is the O2 sensor that is between the firewall and the engine. (Tough to get at.) I changed the one by the radiator with a "generic" sensor and after about 25 miles the CEL came back on. Do you think I changed the correct sensor and if so...are these generic sensors just 'junk?' Thanks.... You changed the wrong one..And you should use OEM parts for this condition... Bank 1=the bank 1 cylinder is on Bank 2=the bank 2 cylinder is on Regards, lexushead ASE/L1 Master Toyota Lexus Factory Certified Master www.toyautoservice.com Quote Link to comment Share on other sites More sharing options...
zockslexus Posted January 29, 2008 Share Posted January 29, 2008 the one you are looking for is on the number one cylinder exhaust between the firewall and the engine Quote Link to comment Share on other sites More sharing options...
camlex Posted January 29, 2008 Share Posted January 29, 2008 both are same , just replace Quote Link to comment Share on other sites More sharing options...
tigerpilot Posted January 29, 2008 Author Share Posted January 29, 2008 both are same , just replace Thanks...I'll look for it this weekend. I guess that you guys recommend O.E. parts. Quote Link to comment Share on other sites More sharing options...
camlex Posted January 30, 2008 Share Posted January 30, 2008 I did replaced with Toyota parts ~$110. Quote Link to comment Share on other sites More sharing options...
Sunny23 Posted January 30, 2008 Share Posted January 30, 2008 I replaced my Bank 1 O2 sensor, no more check engine light. car run like brand new Sunny Quote Link to comment Share on other sites More sharing options...
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