hazchuen Posted July 1, 2005 Share Posted July 1, 2005 I just went to check my car and I got a "Code 21:Oxygen Sensor Signal or Circuit fault". Which Oxygen sensor is it on my 2000 RX300 with 1MZ-FE (3.0 c.c V-6) engine? Quote Link to comment Share on other sites More sharing options...
SKperformance Posted July 4, 2005 Share Posted July 4, 2005 that is the HVAC system code for a solar sensor not eh engine computer code. Go and read the general maintance section for more details Quote Link to comment Share on other sites More sharing options...
hazchuen Posted July 4, 2005 Author Share Posted July 4, 2005 that is the HVAC system code for a solar sensor not eh engine computer code.Go and read the general maintance section for more details ← i'm not using an OBDII computer here. just a general Rennacs code reader. and it says exactly, ' EFI Fault Code Screen: ' ' 21: Oxygen Sensor Signal Or Circuit ' ' Last Fault Code In Memory ' Quote Link to comment Share on other sites More sharing options...
hazchuen Posted July 20, 2005 Author Share Posted July 20, 2005 change both banks oxygen sensor with O.E.M parts 89467-48011, and it still does not make any difference. what a waste of money. wonder if there is anything wrong with my ecu? Quote Link to comment Share on other sites More sharing options...
dcfish Posted July 20, 2005 Share Posted July 20, 2005 change both banks oxygen sensor with O.E.M parts 89467-48011, and it still does not make any difference. what a waste of money. wonder if there is anything wrong with my ecu? ← 12 RPM Signal 13 RPM Signal 14 Ignition Signal 15 Ignition Signal 16 Electronically Controlled Transmission Control Signal 17 CMP No. 1 18 CMP No. 2 21 Main O2S & Heater Signal 22 ECT Sensor Signal 24 IAT Sensor Signal 25 Air–Fuel Ratio Lean Malfunction 26 Air–Fuel Ratio Rich Malfunction 27 Sub O2S Signal 28 Main O2S 29 Sub O2S 31 & 32 Air Flow Meter Signal 35 HAC/Barometric Pressure Sensor Signal 41 TP Sensor Signal 42 VSS Signal 43 Starter Signal 47 Sub TP Sensor 48 Secondary Injection System Malfunction 51 Switch Condition Signal 52 KS Signal 53 Knock Control Signal 55 KS Signal 70 EGR System Malfunction 71 EGR System Malfunction 78 Fuel Pump Control Quote Link to comment Share on other sites More sharing options...
hazchuen Posted July 22, 2005 Author Share Posted July 22, 2005 so what are you trying to tell me here DCFISH? Quote Link to comment Share on other sites More sharing options...
dcfish Posted July 22, 2005 Share Posted July 22, 2005 so what are you trying to tell me here DCFISH? ← Misunderstood your topic , My bad. Quote Link to comment Share on other sites More sharing options...
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