Hi emissionwiz. Please accept my apologies as I stand corrected on the fault code - it is indeed P0155. You previously mentioned where the sensor is located, could you please tell me again? Thank you very much.
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Re: 2001 Blazer - engine warning light stays on
You have a problem with the O2 sensor on bank 2, bank 2 is the bank opposite the bank that #1 cylinder is in, but I would recommend that you replace the bank 1 and 2 sensors as a pair, the factory always wanted it done that way, and you know how cheap they are. The O2 or oxygen sensors are located before the catalytic convertors near the exhaust manifold, they will have anywhere from 2 to 4 wires at the connector, you may need a special socket to remove them if access is a issue. When the parts are installed, disconnect the battery for 5 minutes and that will clear the code. Good luck, don't burn yourself!
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EVAP Evaporative Emission Control System .follow this link for the P0446 fault , this is a problem with the Engine Evap valve , this link describes in detail the system etc. The other code P0155 is for the Front Oxygen sensor bank 2 , this could be a faulty wiring connection or the sensor its self so further diagnosis will be required .I would advice using a good quality fuel addative , one that covers the catalytic convertor as well as the usual engine parts, injectors etc as there may just be build up of carbon on the sensor that is restricting the signal being recieved , keep me posted if you wish
Hi, the light will go off by itself once the fault is corrected. The light indicates the computer has detected a fault in the engine control system. Have you had the truck scanned at your local auto parts chain store? If not, please do that and send us the trouble code for further advice.
p0155 is an oxygen sensor code. ( 02 sensor bank 2 sensor 1 ). I believe bank two is the one for cylinders 2, 4, and 6. Sensor 1 would be the
first one that is closest to the beginning of the exhaust manifold. hope this helps and have a good day ! on passengers side of engine. go to any auto parts store to purchase the sensor.
Hello! Both faults are pointing at the same Oxygen Sensor...Upstream Bank 2...Meaning in the exhaust header before the Cat. converter on the right side of the engine...O2 sensors generally cause a P-code as an effect rather than a cause...But in this instance it's a defective O2 Sensor...Replace...
wow 9 months old p0705 trasmision range (TR) sensor ,circuit out of range. if you got that code read at an auto parts store for free you should have gotten a print out of trobble shooting tips .things like check electrical connection or how to check the sensor itself . the light will stay on untill the fault is corrected if you get it cleared off it will come back on and it will only stay until the fault is corrected. most times it will go out by itself when the fault is corrected