RazorSpikes Posted June 7, 2007 Report Share Posted June 7, 2007 It's been approximately one week since i changed my o2 sensor after getting a service engine soon light and pulling code p0133-Heated Oxygen Sensor (HO2S) Slow Response Bank 1 Sensor 1. Today the service engine light came on again with code p1134-Heated Oxygen Sensor (HO2S) Transition Time Ratio Bank 1 Sensor 1. What would cause this? Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted June 7, 2007 Report Share Posted June 7, 2007 Possibilities I would investigate: Bank 1 is running rich and coating the sensors The wiring running to the O2 sensor is intermittant Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
JimD Posted June 7, 2007 Report Share Posted June 7, 2007 Bank 1 sensor 1 connects to the PCM at connector C2 terminals 65 and 66. You want to be sure those terminals are clean and secure. If it was my car, I would also drive it on an Interstate highway for an hour or so with varying engine speeds and get the exhaust system heat soaked. Clear the codes and see what comes back. O2 sensors rarely fail; they simply report how the engine responds to commands from the fuel trim system when the engine is in closed loop operation. Have you noticed a drop in fuel economy or engine performance lately? Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
KevinW Posted June 7, 2007 Report Share Posted June 7, 2007 Those two codes represent different problems. Is the replacement an OEM part? ___________________________________________________ Link to comment Share on other sites More sharing options...
RazorSpikes Posted June 8, 2007 Author Report Share Posted June 8, 2007 Possibilities I would investigate: Bank 1 is running rich and coating the sensors The wiring running to the O2 sensor is intermittant Do you mean I have a short in my o2 wiring? What would make bank 1 run rich? How do I fix it? Bank 1 sensor 1 connects to the PCM at connector C2 terminals 65 and 66. You want to be sure those terminals are clean and secure. If it was my car, I would also drive it on an Interstate highway for an hour or so with varying engine speeds and get the exhaust system heat soaked. Clear the codes and see what comes back. O2 sensors rarely fail; they simply report how the engine responds to commands from the fuel trim system when the engine is in closed loop operation. Have you noticed a drop in fuel economy or engine performance lately? Since i changed the o2 sensor i have better fuel economy and smoother performance from my ride. I cleared the code last night and it didn't come back today. I have my fingers,toes, and eyes crossed. Those two codes represent different problems. Is the replacement an OEM part? I replaced the stock o2 sensor with a bosch oem replacement. I hope this helps... I love this STS. I just bought it about a month ago and this is the first problem I have experienced. Link to comment Share on other sites More sharing options...
Logan Posted June 9, 2007 Report Share Posted June 9, 2007 "OEM parts on OBDII" . Thats our feeling. The OBDII systems are so sensitive to original parts. Been there done that. Been burned.... Seen aftermarket Bosch O2 sensors not pass the PCM test. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
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