P0135, P0155

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Mar 4, 2010 | 08:13 PM

mcdiver

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P0135, P0155

I have seen another message about this on an Excursion. But I am looking for some specific info on my truck if anyone can help.

I have a 2003 F-250 Super Duty 4x2 with the 5.4.

I started the truck the other day and the check engine light came on, when I checked the codes, both of these came up for the o2 sensors on bank 1 and bank 2. It has been suggested that I check the fuse for the ho2, but I was not able to find it in the manual. I checked all data online and found what I think is the fuse, but it is not blown.

I have never known 2 o2 sensors to go bad at once, this is a little confusing for me, any help?

Mike

Mar 4, 2010 | 10:17 PM

superdutyduck

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when i had my explorer it threw the bank 1 code. i replaced it and then it threw the bank 2 code. might as well change both if you the opportunity to.

Mar 5, 2010 | 01:27 AM

redford

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From: Stephensville WI

P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Have you looked at the O2 sensor heater circuit?

Mar 5, 2010 | 07:10 AM

mcdiver

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I have tried to check the heater circuit; however, as I said, I am having trouble finding the correct fuse for it. The fuse I think it is, is not blown.

Mar 5, 2010 | 07:28 AM

GUNNERDOG

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From: North Carolina

anytime more than one thing fails at the same time, and fuses all check good, i start checking grounds. O2 heater ground? (im just guessing here, not real familiar with the O2 system.) Ill take a look in my shop manual for ya when i get home tonight.

Mar 5, 2010 | 07:39 AM

mcdiver

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I have tried to check the heater circuit; however, as I said, I am having trouble finding the correct fuse for it. The fuse I think it is, is not blown.