whiskey Posted September 21, 2004 Share Posted September 21, 2004 My check engine light is on. An oxygen sensor needs to be replaced. the code is p1035. The bank 1 sensor 1 needs to be replaced. Does anyone know which/where that sensor is? the part is also $161.00 from advanced auto. please help. thanks!!! Quote Link to comment Share on other sites More sharing options...
svarog Posted September 21, 2004 Share Posted September 21, 2004 What does an oxygen sensor sense? Isn't there always oxygen, also what is it for? I never heard of a part like that. Quote Link to comment Share on other sites More sharing options...
branshew Posted September 21, 2004 Share Posted September 21, 2004 There are 2 sensors in the exhaust manifold before the catalytic converter and one sensor after the cat. Someone that is more familiar with the codes may be able to tell you specifically, but I would guess that refers to the first sensor before the cat. Changing an O2 sensor is incredibly easy. If you have a set of wrenches or a socket set w/ an O2 sensor socket then it is only a couple of quick turns. Unplug the wiring harness at the contact point, remove the old O2 sensor, then put the new sensor back in place and plug it back in to the harness. Find someone to reset the code and you're set. Also, you may find better prices on sensors here. You can even get the socket adaptor from them. Just stay away from the universal type unless you want to cut & splice wires under the hood. Quote Link to comment Share on other sites More sharing options...
steviej Posted September 21, 2004 Share Posted September 21, 2004 Bank 1 Sensor 1 is the O2 sensor in the exhaust manifold that is between the engine and the firewall. (already had to do mine.....under warranty) steviej Quote Link to comment Share on other sites More sharing options...
whiskey Posted September 21, 2004 Author Share Posted September 21, 2004 is that the one you can see at the front of the engine towards the grill? i don't see another one. i have the socket and sensor. just want to be sure to change the right one. if that isn't the one, do you stand by the drivers side or passenger side to see the other one? thanks for the help. i really appreciate it. Quote Link to comment Share on other sites More sharing options...
steviej Posted September 22, 2004 Share Posted September 22, 2004 svarog basically stated, the O2 sensor detects the amount of air in relation to unburned fuel. This ratio is signalled back to the ECU so that proper settings can be made by the computer for fuel and air delivery to a particular group of cylinders. Cars used to have 1 located just in the exhaust in front of the catalytic converter, and they were replaceable for about $30. As emmisions became more and more stringent, emerging emissions technology requied better control and more thorough monitoring. O2 sensors found there way to each set of cylinders and even after the cat. do a google search on oxygen sensors to get a better description. whiskey try jacking up the front of the car. If I remeber correctly, the O2 sensor for the Bank 1 Sensor 1 can be reached from underneath the car. I may be completely wrong, but I think I remember seeing one on the rear exhaust pipe last time I was under there. Mind you, I may have the post cat sensor in mind. The one by the grille is Bank 2 Sensor 1. steviej Quote Link to comment Share on other sites More sharing options...
mburnickas Posted September 22, 2004 Share Posted September 22, 2004 steviej- You are right. You can get to it from underneath the car or on the side of the car also. (Bank 1 Sensor 1 is right where you posted). Quote Link to comment Share on other sites More sharing options...
AjayD Posted September 22, 2004 Share Posted September 22, 2004 I had to change the same one... It was a lot easier to reach in from the top. Its right behind the engine towards the bottom. Quote Link to comment Share on other sites More sharing options...
steviej Posted September 23, 2004 Share Posted September 23, 2004 (edited) Sorry, I have given some misinformation in the picture posted and retracted it. The picture previously posted is of bank 1 sensor 2. That picture has been moved further up in this thread to answer the subsequent members question. The following is what I have obtained from my 2002 ES shop manual: Bank 1 is the right hand three cylinders (RH) that are against the firewall, that information was correct. O2 sensor bank 1 sensor 1 is the one in the RH header/exhaust manifold assembly. Bank 2 is the left hand three cylinders (LH) up front by the radiator. O2 sensor bank 2 sensor 1 is the one in the LH header/exhaust manifold assembly. again, I apologize for any confusion. steviej Edited September 26, 2004 by steviej Quote Link to comment Share on other sites More sharing options...
AjayD Posted September 23, 2004 Share Posted September 23, 2004 I thought that is the Bank 2 Sensor 1 Quote Link to comment Share on other sites More sharing options...
steviej Posted September 23, 2004 Share Posted September 23, 2004 Bank 2 Sensor 1 is in the manifold that is next to the oil filter up front. That one is reachable from standing in front of the car. steviej Quote Link to comment Share on other sites More sharing options...
jay420 Posted September 25, 2004 Share Posted September 25, 2004 Hi Guys I had a diag. run on my ES and have a problem with an 02 sensor also. My code is po136 bank 1 sensor 2 circuit malfunction. Can you guys tell me where this sensor is? Quote Link to comment Share on other sites More sharing options...
steviej Posted September 26, 2004 Share Posted September 26, 2004 this is a picture I posted in a thread about changing your tranny fluid. I remebered there were pictures and sure enough I caught Bank 1 Senor 2 in a picture. In this picture, the exhaust pipe makes a u turn. There is a spark plug looking sensor screwed into the "U" bend in the exhaust pipe. (in the picture right under the word PAN). That sensor is the Bank 1 Sensor 2 O2 sensor. steviej Quote Link to comment Share on other sites More sharing options...
steviej Posted September 27, 2004 Share Posted September 27, 2004 I was under the car today and can confirm that BOTH Bank 1 sensors are very easily reachable from underneath the car, just jack it up high AND as always, support it safely with 2 jack stands. steviej Quote Link to comment Share on other sites More sharing options...
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