1999 Chevrolet Suburban O2 sensor

1999 CHEVROLET SUBURBAN

5.7L • V8 • 2WD • AUTOMATIC

MATTIO75

MEMBER
9 POSTS

I've had a check engine light on in my truck for about a week now. I went to a mechanic to see what was wrong and he read the codes off to me: p0160 and p0161. I've googled the issue and it seems like it may be related to the oxygen sensor, but is it possibly a larger problem than just the oxygen sensor?

Nov 2, 2015 at 7:39 PM

CAR-MAN145

✓ASE Certified Mechanic
321 POSTS

I would not think so I would replace the sensor and retest but most of the time when the heater is the problem then its the sensor.

Nov 3, 2015 at 12:23 AM

MATTIO75

MEMBER
9 POSTS

So, i've replaced the o2 sensor that the code said was bad. p0161 is bank 2, position 2, which is passenger side downstream. I've now driven my truck about 70miles but the check engine light is still on.

How long does it take before the system resets? Should I unplug the battery or something?

Nov 3, 2015 at 7:47 AM

CAR-MAN145

✓ASE Certified Mechanic
321 POSTS

need to discount the battery or the to a shop to clear the code or I think is 50 starts before it resets itshelf

Nov 4, 2015 at 12:28 AM

MATTIO75

MEMBER
9 POSTS

I just drove it normally for 4 days and it reset itself. It took 170miles and 4 days after I changed the o2 sensor.

Thank you for your help!

Nov 7, 2015 at 12:01 PM

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