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P0135 O2 Sensor Heater Circuit Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes Joelbbvette New User Feb 9, 2009, 12:24 PM Post #1 of 3 (5881 views) P0135 O2 Sensor Heater Circuit Sign In My wife has a 1998 Toyota Avalon with the V-6, automatic (don't think they made a stick), 120K miles that got the engine light on. Checked the codes and it reads as a P0135 O2 Sensor Heater circuit. A quick look at the car shows only O2 sensors in the exhaust manifolds, nothing near the catalytic converter. So is Bank 1 the closest to the firewall or up front? Also should I use any special lubricants on the threads before installing this? Should both be done at once as one is easy and one is going to be a real pain? Dealership says $157 for the parts and $95 labor, ouch. Thanks Joel Double J Veteran / Moderator Feb 9, 2009, 12:49 PM Post #2 of 3 (5877 views) Re: P0135 O2 Sensor Heater Circuit Sign In Bank 1 is the bank that has the number one cylinder. In this case,its the cylinder head closest to the firewall. Bank 1 sensor 1 is in that exhaust manifold. Bank 2 sensor 1 is in the front exhaust manifold Which one is showing as faulty? You can use an anti-seize compound on the threads..new ones may have it on them already. If not,make sure you get one thats oxygen sensor safe and apply to the threads only. (This post was edited by JIM N on Feb 10, 2009, 11:51 AM) Loren Champlain Sr Veteran / Moderator Feb 9, 2009, 3:57 PM Post #3 of 3 (5872 views) Re: P0135 O2 Sensor Heater Circuit Sign In PO135 is bank one, sensor one. Front cylinder on pass side. This does use a downstream O2, by the way. It should be aft of the catalytic converter. Loren SW Washington   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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