Where is bank 1 sensor 2 on f150 4.6 Eng. . - 1997 Ford F150 Regular Cab

Here's a link for codes P0446,P0443. https://www.obd-codes.com/p0446 Here's the link for P0403. P0403 Exhaust gas recirculation EGR circuit malfunction Here's code P0135 P0135 OBD II Trouble Code O2 Sensor Heater Circuit Malfunction Bank 1... Here's code P0141 P0141 OBD II Trouble Code O2 Sensor Heater Circuit Malfunction Bank 1... Here's code P0155. P0155 OBD II Trouble Code 02 Sensor Heater Circuit Malfunction Bank 2... Here's the last code.yay P0161. P0161 OBD II Trouble Code HO2S Heater Circuit Malfunction Bank 2 Sensor 2... The last 3 codes might just be one sensor.

the front sensor will be HO2s sensor . the O2 sensor is the one after the cat converter. 2 completely different sensors.

This vehical has two knock sensors bank 1 and bank 2 ! bank 2 sensor screws into the side of the engine block closest to the firewall. and it is above the crank sensor. Knock Sensor (KS) Bank 1 sensor is on front side of engine block right of the oil filter and on the other side of knock sensor is the oil pressure sending unit.

Code 135 is for a faulty heater in the O2 sensor. Since you have replaced the sensor the problem is probably the circuit or the power source for the heater.
You'll need to check the heater circuit next.

Bank 2 is the bank that is farther back than the other when looking at eng from the front you will see that one cyl head is farther forward (closer to radiator than the other. this is #1 Bank) #2 is the opposite and sensor #2 is the one after the Catyliac Convertor towards the muffler. #1 sensor is between head and Cat.

P0010....'A' Camshaft Position Actuator Circuit (Bank 1)

P0011....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0012....'A' Camshaft Position - Timing Over-Retarded (Bank 1)

P0013....'B' Camshaft Position - Actuator Circuit (Bank 1)

P0014....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0015....'B' Camshaft Position -Timing Over-Retarded (Bank 1)

P0020....'A' Camshaft Position Actuator Circuit (Bank 2)

P0021....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0022....'A' Camshaft Position - Timing Over-Retarded (Bank 2)

P0023....'B' Camshaft Position - Actuator Circuit (Bank 2)

P0024....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0025....'B' Camshaft Position - Timing Over-Retarded (Bank 2)

I think your sensors are pattern parts and the readings /resistances are not the same as the original parts ,try some bosch units is my first suggestion ,

tis telling u about Oxygen sensor..bank 1 n 2 means exhaust manifold ( u have on each manifold before and after the catalytic converter.. ( ti's for 6 cyl.. very common on ford eng..(windstar..have 2 catalyctic.. O sensors is about $50 a pc..

Your auto has four O2 sensors. Two upstream and two downstream; With two banks. Bank 1, sensor 1...and bank 2, sensor 1 are the two upstream (exhaust manifold before the catalytic). Bank 1, sensor 2 and bank 2, sensor 2 (other side of catalytic)

Code 1131= upstream; bank 1..sensor 1
Code 1151= upstream; bank 2..sensor 1
Code P0136 (generic code) bank 1..sensor 2 (questionable)

I wouldn't spend the money to purchase 3 sensors. Highly unlikely all three are bad; Cost is about $40/ ea.
Since there isn't a code for the cat's themselves, I would suspect the O2 circuit is malfunctioning. The rough idle is another clue.


Take an ohmmeter set it on X10 scale and measure the resistance from engine to body and body to negative post on battery terminal. You should read zero ohms (full needle deflection). If you do go buy two upstream O2 sensors. If you read
open or a high resistance run two straps from eng. to body...and body to neg.batt. post.

FixYaWIZ................saailer



I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Bank #2 referes to the side of the eng in which cyl. #2 is snsr #1 referes to the sensor before the cat. conv. and the code is for a slow response so, basically a lazy O2 snsr. So if you can locate cyl. #2 and follow the exaust manifold on that side of eng. the very first O2 snsr you see is the one in need of diag./repair

weird. usually an intermitent problem like that for are o2 sensor means that your catalytic converter is starting to cause problems but that should only set a code for sensor 2 not both sensors. sorry i cant be more help