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Re: o2 sensor where are they located
The 1996 grand only used 2 02 sensors on the 2 engine options.....the 5.2 v8 sensors are located 1 just in front of the convertor and the downstream is in the convertor....the 4.0l the downstream is in the convertor and the upstream is located in the exhaust manifold right under the intake manifold.
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O2 sensors are always after the cat converter and HO2S sensors are always before the cat converter.
p0135 refers to heated oxygen sensor(HO2S) 1 bank 1-heater control--circuit malfunction
If it is a straight 6 cylinder engine with 2 cat converters it will be the sensor before the cat converter that connects to the manifold from pistons 1.2.3
If it is a V6 it will be the sensor that is in front of the cat converter that connects to the rear bank pistons 1.2.3. Use the special socket when removing/replacing the sensors to prevent wiring damage
P0134 - O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1
P0135 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
P0053 - O2 Heater Resistance Bank 1 Sensor 1
P0030 - O2 Heater Control Circuit Bank 1 Sensor 1
You need to replace the O2 Sensor Bank 1 Sensor 1
Carquest can help you get the correct part and help you locate it.
standing in front of the vehicle looking at the engine bank 1 sensor 2 is the sensor after the cat converter on the bank on your left
bank one is the left cat ---bank 2 is the right cat. Sensor 1 is the one before the cat and sensor 2 is the one after the cat on either side
P0135 bank 1 sensor 1 open or short in wires,bad connections,bad sensor ,or bad ecm. P0141 bank 1 sensor 2 same diag as P0135. P0420 cat below threshold open or short, or faulty Ho2s sensors.you may have several problems. start with sensors circuit if good change sensors if not trace to ecm if reading not right replace ecm if all good replace sensors clear codes retest drive two drive cycles for cat to clear tests. then with no dtcs present test fuel pressure , injectors,then ignition system ,timing valves ,map,maf sensors,throttle sensor,crank sensor cam sensor, compression.
O2 sensors have built in heaters to help them warm up faster. The O2 sensor in the No.1 bank of cylinders may have an inoperative heater or the wiring to the heater element is damaged. Changing that O2 sensor may correct your problem.
if you aren't getting the corresponding bank 1 sensor 1 code, P0135, you may have gotten the wrong O2 sensor, or perhaps it is defective? There is the chance that if you put some anti-seize on the O2 sensor threads or on the exhaust threads that you may have gotten something on the sensor itself clogging it up....
I believe sensor 1 is pre catalytic converter, but this code refers to the internal heater in the O2 sensor... so if all else fails, you may just have to buy or exchange for another and see if it helps your problem