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Where is the o2 sensor heater monitor fuse located on a 1997 ford f150 4.2

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  • 11 Answers

In the power distrubution box marked emiss or air pump

Posted on Jan 07, 2013

  • kimberly_pat
    kimberly_pat Jan 07, 2013

    which relay is it?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Oxygen Sensor Location 2001 Ford Expedition Eddie Bauer

There are four o2 sensors on this truck. one on each side just below the exhaust manifold, and one on each side behind the second catalytic converters. (just about even with the back of the front doors.

Posted on Jun 18, 2008

Ajkill
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SOURCE: 2003 Ford Ranger/2.3 O2 sensor - How many and Where located ???

Engine Heated oxygen and catalyst monitor sensors—2.3L engine44e2701.jpg

Posted on Jan 16, 2009

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SOURCE: Need locations of o2 sensors in a 04 Ford Escape.

bank 1 sensor 1 is next to the fire wall. on the upper end of the exhaust

Posted on Aug 14, 2009

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SOURCE: Where is the O2 Sensor located on 2003 Ford Focus?

The code will tell you which O2 sensor it is.
The code will point to either bank 1 sensor 1; bank 1 sensor 2; bank 2 sensor 1; bank 2 sensor 2.

From what I remember with a focus, it should only have 2 sensors, sensor 1 will be located before the cat, and sensor 2 will be located after the cat.

Posted on Oct 08, 2009

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bschilz
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SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape

B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter

You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks

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Posted on Oct 20, 2009

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2 Answers

97 Cadillac deville all four 02s keep coming back after repairs was made P0135, 0138, 0141, 0155,or could it be the coil packs


all of those codes listed have a common fault listed and that is the ECM
substitute it with a known good unit and then see what happens

Sep 05, 2016 | 1997 Cadillac DeVille

3 Answers

1997 plymouth voyager w/ codes: P0140 O2 sensor circuit no activity detected (bank 1(2) sensor 2


The Powertrain control module (PCM) will provide a .45 volt reference voltage to the Oxygen sensor. When the O2 sensor reaches operating temperature, it will generate a voltage that will vary depending on the oxygen content of the exhaust. Lean exhaust generates a low voltage (less than .45V) and rich exhaust generates a high voltage (greater than .45V). O2 sensors on a specific bank marked as "sensor 2" (as this one is) are used to monitor emissions. A Three-Way Catalyst (TWC) system (catalytic converter) is used to control tailpipe emissions. The PCM uses the signal received from Oxygen sensor 2 (#2 indicates aft of catalytic converter, #1 indicates pre-converter) to read efficiency of TWC. Normally this sensor will switch between high and low voltage at a noticeably slower rate than the front sensor. This is normal. If the signal received from rear (#2) O2 sensor indicates that the voltage has "stuck" between .425V to .474 V, the PCM determines this sensor is inactive and this code will set.
Potential Symptoms Your check engine light(CEL), or malfuction indicator lamp (MIL) will be illuminated. There will not likely be any noticeable drivability problems other than the MIL. The reason is this: The rear or post catalytic converter Oxygen sensor does not affect fuel deliver(this is an exception on Chryslers). It only MONITORS the efficiency of the catalytic converter. For this reason, you will likely not notice any engine trouble.
Causes The causes for a P0140 code are fairly few. They could be any of the following:
  • Shorted heater circuit in O2 sensor. (Usually requires replacement of heater circuit fuse in fuse block also)
  • Shorted signal circuit in O2 sensor
  • Melting of harness connector or wiring due to contact with exhaust system
  • Water intrusion in harness connector or PCM connector
  • Bad PCM
Possible Solutions This is a fairly specific problem and shouldn't be too difficult to diagnose.
First, start engine and warm up. Using a scan tool, watch the Bank 1, sensor 2, o2 sensor voltage. Normally the voltage should switch slowly above and below .45 volts. If it does, the problem is likely intermittent. You'll have to wait for the problem to surface before you can accurately diagnose.
However, if it doesn't switch, or is stuck then perform the following: 2. Shut off vehicle. Visually check the Bank1,2 harness connector for melting or chafing of the harness or the connector. Repair or replace as needed 3. Turn ignition on, but engine off. Disconnect the O2 sensor connector and check for 12Volts at the Heater Circuit supply and for proper ground on the heater circuit ground circuit. a. If 12V heater supply is missing, check the proper fuses for an open in the circuit. If heater circuit fuse is blown, then suspect a bad heater in the o2 sensor causing a blown heater circuit fuse. Replace sensor and fuse and recheck. b. If ground is missing, trace the circuit and clean or repair ground circuit. 4. Next, with connector still unplugged, check for 5 Volts on the reference circuit. If this is missing, check for 5 Volts at the PCM connector. If 5 Volts is present at the PCM connector but not at the o2 sensor harness connector, then there is an open or short in the reference wire supply between the PCM and the o2 sensor connector. However, if there is no 5 Volts present at the PCM connector, the PCM is likely at fault due to internal short. Replace PCM. ** (NOTE: on Chrysler models, a common problem is the 5Volt reference circuit can be shorted out by any sensor on the car that uses a 5 Volt reference. Simply unplug each sensor one at a time until the 5 Volts reappears. The last sensor you unplugged is the shorted sensor. Replacing it should fix the 5 Volt reference short.) 5. If all the voltages and grounds are present, then replace the Bank 1,2 O2 sensor and re-test.

May 26, 2011 | Plymouth Voyager Cars & Trucks

3 Answers

Where is the heater o2 censor located


Check this diagram (click for zoom)...

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Hope this helps (remember to rate thsi answer).

Mar 02, 2011 | 1997 Jeep Grand Cherokee

1 Answer

Where is bank 1 sensor 2 on f150 4.6 Eng. .


Diagram: Ford Explorer and V8 O2 (Oxygen) Sensor Locations

Ford Explorer and V8 O2 Sensor Locations diagram. This shows the location of Ford oxygen sensors on Bank 1 and Bank 2. If you want to know where your O2 sensors are, this diagram is your guide.

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Hope helps.

Feb 14, 2011 | 1997 Ford F150 Regular Cab

2 Answers

Code error number p0135


P0134....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)


P0135....O2 Sensor Heater Circuit (Bank 1 Sensor 1) heater in the O2 sensor has packed up first sensor before the cat

Nov 27, 2010 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Where are the O2 sensors on a 1997 ford thunderbird?


hi the o2 sensor are located on the exhaust . 1 will be before the cat and 1 after the cat .

Sep 06, 2010 | 1997 Ford Thunderbird LX

1 Answer

I need a diagram to the location of the oxygen sensors on a 1997 ford escort lx


THERE IS ONE O2 SENSOR IT IS IN THE EXHAUST JUST OFF THE ENGINE AND BEFORE THE CATALYTIC CONVERTER, THE3 OTHER SENSOR AFTER THE CAT CONVERTER IS CALLED A CATALYTIC CONVERTER PERFORMANCE MONITOR, IT LOOKS LIKE A O2 BUT IS NOT..

Jul 05, 2010 | 1997 Ford Escort

1 Answer

I have a 96 Ford Explorer. The service engine


P0141 is for an open or short in the heater circuit of bank 1(passenger side) rear O2 sensor(the one after the catayltic converter). This code will set when the computer runs the heated oxygen sensor monitor which is basically a program kinda like an anitvirus scan on your home PC.
During testing, the HO2S heaters are checked for opens/shorts and excessive current draw. The code will set when current draw exceeds a maximum calibrated limit(3amps) or falls below a minimum calibrated limit(0.220 amps for NKT sensor and 0.400 amps for bosch sensor) and/or an open or short is detected.
Here are the possible causes for this:
·Blown fuse
·Short to VPWR in harness or HO2S
·Water in harness connector
·Open VPWR or GND circuit
·Low battery voltage
·Poor electrical connections from PCM to HO2S sensor
·HO2S heater
·PCM

Now the reason I ask what the codes were is that may help in determining what is wrong. If the other codes you had were also O2 heater cicuit codes example P0135, P0155, P0161 then you may need to be looking at something other than the O2's themself and maybe more toward a blown fuse no. 24 (15amp) in the under hood fuse box,wiring harness problem on the voltage side since all four share this one or a bad PCM.

Mar 19, 2009 | 1996 Ford Explorer

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