Bad 02 Sensors..No Check Engine Light??

rude_life

Member

Mar 30, 2005

372

0

16

Apr 23, 2005

#1

• Apr 23, 2005

• #1

IS this possible? Can your 02 sensors be out of commission without throwing a C.E.L?? Im about to buy new ones just to be on the safe side.

 

jermy82

Founding Member

Feb 2, 2002

446

0

0

Sherman, Illinois

Apr 23, 2005

#2

• Apr 23, 2005

• #2

I'm pretty sure it can be bad since I've run my car momentarily with open headers and O2 sensors not even hooked up and it didn't throw a CEL at me. But like you said, it couldn't hurt to replace them if they have quite a few miles on them anyway.

 

Car Nut

Founding Member

Jul 6, 2000

1,176

1

37

Snellville, Georgia (Atlanta area)

Apr 23, 2005

#3

• Apr 23, 2005

• #3

How often should O2 sensors be replaced? Like every 30K miles or more?

I've wondered this same stuff myself. Can't completely rely on the check engine light.

 

W

wytstang

Mustang Master

Mar 14, 2004

4,988

4

78

Summerville,SC missing South Fl. weather :(

Apr 23, 2005

#4

• Apr 23, 2005

• #4

Most bad o2's won't set of the CE light.

How often should O2 sensors be replaced? Like every 30K miles or more?

Click to expand...

Just when there bad there not cheap.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Apr 23, 2005

#5

• Apr 23, 2005

• #5

but one has to run the car long enough for them to light off. as they age, they stop switching as quickly and lose their switching range. they can be pretty jacked and still not trigger a light.

 

gcomfx.com

Founding Member

Oct 22, 2002

3,690

0

56

Republic, MO

Apr 27, 2005

#6

• Apr 27, 2005

• #6

I just bought new ones for my car. Old ones looked original and had 170K+ miles on them.

Basically I wasted $100.