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P0174 code

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Old

Aug 6, 2017 | 02:22 PM

#1

Thread Starter

Staging Lane

Joined: Sep 2005

Posts: 62

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From: Chicago Area

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P0174 code

Could a bad O2 sensor trigger p0174 dtc? My o2 sensor read out stays steady at around 445 mV on passenger side at all throttle inputs, idle, part throttle and wot

Old

Aug 6, 2017 | 10:20 PM

#2

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Staging Lane

Joined: Sep 2005

Posts: 62

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From: Chicago Area

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I also threw two other codes p0151 and p0446.

Old

Aug 7, 2017 | 05:52 PM

#3

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Staging Lane

Joined: Sep 2005

Posts: 62

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From: Chicago Area

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Checked pcv hose for damage but did not see anything obvious for vacuum leak. Will try to get fuel pressure gauge as well to check fuel pressure. Anyone had this problem with a bad o2 sensor?

Old

Aug 7, 2017 | 08:23 PM

#4

TECH Senior Member

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From: Warr Acres, OK

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You have a dead o2 sensor, setting a low voltage code for that O2 sensor, and you wonder what the problem might be?

Old

Aug 7, 2017 | 09:28 PM

#5

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Staging Lane

Joined: Sep 2005

Posts: 62

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From: Chicago Area

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If you don't have something intelligent to contribute how about you keep your smart *** comments to yourself pal

Old

Aug 7, 2017 | 09:38 PM

#6

TECH Senior Member

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From: Warr Acres, OK

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My reply was very intelligent. Looks like you need help seeing the obvious.

Old

Aug 8, 2017 | 09:36 AM

#7

TECH Resident

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From: Baytown, Texas

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Here are possible problems that may cause your codes...

P0446..
https://www.yourmechanic.com/article...pencer-clayton

P0151...
https://www.yourmechanic.com/article...by-jay-safford

P0174...
https://www.yourmechanic.com/article...-blake-griffin

The P0174 points to a lean condition and mentions evap. system also....there are several contributing factors....

Did anything change on the car, start running rough, running rich etc....

T,

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Old

Aug 12, 2017 | 05:42 PM

#8

Staging Lane

Joined: Aug 2009

Posts: 85

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From: Phoenix, AZ

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i was concerned about my o2 sensors too. i'm getting lean in bank one and two. air filter is clean, not a k&n, so not oiled (though i will get one at some point)

I don't notice anything otherwise from the engine, just the check engine light.

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