03 ranger
#1
#2
Whats the code?
O2 sensor bank 1 sensor 1 is passenger side closest to the engine
Bank 1 sensor 2 is the O2 behind Cat converter
High voltage means Rich running Low oxygen in the exhaust
O2 sensor voltage is .1 to .9, so under 1 volt, .1 is lean, high oxygen, .9 is rich, low oxygen, computer adjusts OPEN TIME on the fuel injectors to try and keep Upstream O2 sensors(sensor 1's) at .4 volts
O2 sensor generate their own voltage once they are above 600degF, this it by a chemical reaction, so the chemicals do get used up, 100k miles is recommended change time
Upstream O2 sensor voltage should change rapidly, between .2 and .6 but average .4
Sensor 2, Downstream O2, should should run at a steady .7 to .8 volts, this is because Cat converter has burned up most of the oxygen while cleaning up the exhaust
Sensor 1 high voltage means computer has tried using less fuel on bank 1 but O2 voltage was staying high, but you should also get a Rich Code
Need the exact code to really determine whats happening
O2 sensor bank 1 sensor 1 is passenger side closest to the engine
Bank 1 sensor 2 is the O2 behind Cat converter
High voltage means Rich running Low oxygen in the exhaust
O2 sensor voltage is .1 to .9, so under 1 volt, .1 is lean, high oxygen, .9 is rich, low oxygen, computer adjusts OPEN TIME on the fuel injectors to try and keep Upstream O2 sensors(sensor 1's) at .4 volts
O2 sensor generate their own voltage once they are above 600degF, this it by a chemical reaction, so the chemicals do get used up, 100k miles is recommended change time
Upstream O2 sensor voltage should change rapidly, between .2 and .6 but average .4
Sensor 2, Downstream O2, should should run at a steady .7 to .8 volts, this is because Cat converter has burned up most of the oxygen while cleaning up the exhaust
Sensor 1 high voltage means computer has tried using less fuel on bank 1 but O2 voltage was staying high, but you should also get a Rich Code
Need the exact code to really determine whats happening
#5
You should post definitions with the codes since you probably already looked them up, lol
P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1), passenger side near engine
P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2), passenger side behind Cat Converter
Check Fuse #41 in Engine bay fuse box, it powers the O2 heaters
Assume manual transmission?
And this is a V6 engine, right????
Because I would expect code P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1), driver side near engine
If the fuse was blown, if its a 2.3l 4cyl engine then it only has the two O2 heaters
Each O2 sensor has a heater built in, the computer monitors the heater voltage, "Circuit malfunction" means no heater voltage
P0720 Output Speed Sensor Circuit Malfunction
This sensor is at the rear of the transmission, unplug it and check the connection, could just be loose or dirty
P0xxx codes are generic, not Ford, GM, Honda, ECT...........specific
P1xxx in this case are Ford specific, not generic
So never Google P1xxx codes your will get the wrong answer most of the time
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1, passenger side
P1515 Electric Current Circuit
Both of these can be from Fuse #41 being bad, so you need to check that first and find out why the heaters are off line
P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1), passenger side near engine
P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2), passenger side behind Cat Converter
Check Fuse #41 in Engine bay fuse box, it powers the O2 heaters
Assume manual transmission?
And this is a V6 engine, right????
Because I would expect code P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1), driver side near engine
If the fuse was blown, if its a 2.3l 4cyl engine then it only has the two O2 heaters
Each O2 sensor has a heater built in, the computer monitors the heater voltage, "Circuit malfunction" means no heater voltage
P0720 Output Speed Sensor Circuit Malfunction
This sensor is at the rear of the transmission, unplug it and check the connection, could just be loose or dirty
P0xxx codes are generic, not Ford, GM, Honda, ECT...........specific
P1xxx in this case are Ford specific, not generic
So never Google P1xxx codes your will get the wrong answer most of the time
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1, passenger side
P1515 Electric Current Circuit
Both of these can be from Fuse #41 being bad, so you need to check that first and find out why the heaters are off line
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