Question about 2003 Ford F250 Super Duty Crew Cab

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Fuse location for a ford 03 f-250 co2 sensor

Where are the fuses for the oxygen/heater sensor on f-250 truck

Posted by Anonymous on


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  • 2 Answers

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Posted on Jan 02, 2017

  • 249 Answers

SOURCE: location of heated oxygen sensor - bank 2 sensor 1

You will be told that it is passenger side 02 sensor before the cat,, but it is not .. Drivers side right after the manifold is the one you are after.

Posted on Jul 31, 2010

  • 27 Answers

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

  • 2049 Answers

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


Posted on Oct 20, 2009

  • 1 Answer

SOURCE: ford f350 diesel truck 30 amp fuse keeps blowing.

It is the fuel heater, All you have to do is unplug it.a4c0d50.gif

Posted on Jan 06, 2010

Testimonial: "Thanks for the diagnosis. It's disappointing that our local Ford service will not advise to help get it running, even to make it in for service."

  • 115 Answers


This information can be found at
You just need to give info for year, make and model.
After that choose owners guide. The pages you are looking for are 208-9. The printing is a bit small. I hope this helps.

Posted on Mar 14, 2010

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2 Answers

2002 ford lighting 5.4 engine have four co2 sensor codes is their a fuss what is the number. thank you.

What are the codes? If all 4 are O2 sensor heater related, then it could be a fuse issue. But first post the codes.

Sep 26, 2017 | Ford Cars & Trucks

1 Answer

2003 ford escape oxygen sensor fuse

One fuse for the 02 heater circuits. My info shows four 02 sensors, all four heater circuits get voltage from the same fuse.

Sep 22, 2017 | Ford Cars & Trucks

1 Answer

Fuse location, oxygen sensor bank 2, sensor 2. 2005 Pontiac G6.

Fuse ????? Heater circuit of O2 sensor ? emission 1 fuse # 6 10amp , location - under hood fuse box.

Jul 13, 2017 | Pontiac Cars & Trucks

1 Answer

2001 ford ranger xlt 4.0 I t I unplugged engine and and main wiring harness to engine fuse 41 atill blows as soon as i replace it what else can i check to find short

OK, its impressive that you unplugged many things tracing a fuse.
The1st thing you SHOULD have done is look up the fuse chart for fuse 41. Its in your owners manual.

Fuse 41 feeds the Oxygen sensor heaters.
You may wanna start by ohms or current checking the heaters, or pulling fault codes and seeing if any particular heater is setting a SHORTED code. Unplugging the heater(O2 sensor) may show you that it stops the fuse blowing and the problem is resistance low in that sensor. If it doesnt fix it, likely you have wiring rubbed through somewhere on the heater circuit. This can be checked by using a diagram and component locations to trace the routing of the heater power line back to the fuse, and finding where it has rubbed through and may be touching ground.

Problems with electrical are often best tackled with information on the system. Print out your diagrams before you start unplugging stuff or you are just adding extra work

Nov 15, 2015 | Ford Cars & Trucks

1 Answer

Where does the hego fuse lead to in 2001 ford escape

To the oxygen sensor in the exhaust stream. That is the fuse for the heater element inside the oxygen sensor, to make it work quicker during cold start ups.

Feb 21, 2015 | Ford Cars & Trucks

2 Answers

P0037. heater sen. where is it on the engine?

The code is for the heater in the O2 sensor bank one sensor two. That would be the sensor after the catalytic converter on bank one.
It could be the sensor itself or the power supply for the heater.

Aug 25, 2012 | 2006 Mazda MPV

1 Answer

1995 Cadi SLS Codes, P0030 & P0036, Ckt Fuse or Relay Defective, checked fuse ok, where is relay located?

Hi there,

P0030 = HO2S Heater Control Circuit (Bank 1 Sensor 1) - No.1 Heated Oxygen sensor on bank 1.
P0036 = HO2S Heater Control Circuit (Bank 1 Sensor 2) - No. 2 Heated Oxygen sensor on bank 1

For both of these to trigger on the same bank, means most likely an Open or Short to Ground condition (somewhere on the Bank 1 circuit) stopping the HO2 sensors from reaching their working temperature.

Check the following in this order:

1) Using a multimeter, check 'continuity' of the Oxygen circuit FUSE terminals (don't rely on visual inspection alone) or replace fuse with a known good one.
2) Check for moisture getting into both oxygen sensor connector terminals (bank 1).
3) Check for good connection at Oxygen sensors (bank 1).
3) Have both heated oxygen sensors on Bank 1 tested (ensure their values are to specification).
4) Check HO2 pin-outs of the PCM for correct voltage.

Only replace the HO2 sensors as a last resort (if out of spec).

Then engine department relay centre & fusebox location is behind the washer bottle, but I believe the HO2 sensors are connected direct to the PCM, not a relay.


"If this has helped you in any way, please rate this solution"

May 07, 2011 | Cadillac Seville Cars & Trucks

1 Answer

Subaru wrx impreza showing fault code p0037. how do i fix this fault which sensor is it and where is the sensor located?

It's an O2 sensor according to the above link, and it is bank 1 sensor 2 low, the 2 meaning that it is downstream past the catalytic converter but not on the manifold.

- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM) Possible Solution Tech Notes The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.
Good luck on this repair.

Jan 01, 2011 | 2001 Subaru Impreza

1 Answer

2000 ford taurus keeps blowing fuse#28 in the engine compartment

The heading says2000 taurus and 1999 taurus. I looked up the wiring for a 1999 taurus. Fuse #28 goes to the heated oxygen sensors and the canister vent solenoid. You have 2 oxygen sensors (green connectors)and 2 catalist monitors(blue connectors) that use this fuse for the heaters that are in the sensors. I would check these sensors to see if any of their wiring is shorted. I have seen in the past where oxygen sensor wiring would rub on a front drive axel and wear thru the wire insulation causing a short. You really need to look at all 4 sensors and their wiring closely for shorts. If they look ok then disconnect all of them and reconnect 1 by 1 until fuse blows again. Fuse #28 also powers the canister vent solenoid which is located under the trunk (under the car) in a black plastic housing (approx 1ft by 1ft). It is the only item with wires going to it. If you disconnect this and the fuse stops blowing then it is shorted. Also check the wiring to see if it rubs or is shorted anywhere.
Hope this helps

Apr 07, 2010 | 1999 Ford Taurus

2 Answers


Yes it could be a fuse. You need a test light or volt meter to test.
A fuse goes bad because of an overload of amps, or a short. (A bad fan motor can short out). Check all fuses. (See the owners manual for locations) If all is good, you need to see if you get voltage to the fan motor. If the fuse is blown, or bad, replace it and try it again, if it blows again, unplug the heater fan and then try another fuse. If it doesn't go bad, the motor may be bad. Cost will depend on what you can do yourself.

Jan 31, 2010 | 2004 Ford Focus

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