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08-31-2012, 09:17 PM #1
1999 Chevy K1500 throwing 3 similiar codes:p0134,p0154 & p0155
My 1999 Chevrolet K1500 keeps throwing the same three codes.
1. P0134 Bank 1 Sensor 1
2. P0154 Bank 2 Sensor 1
3. P0155 Bank 2 Sensor 1
Can anyone please help, is the problem the ECM? I find it hard to believe multiple O2 Sensors failed at the same time. If anyone has a explanation I would appreciate some direction/explanation on how to fix this issue. I was getting 400 miles to a tank of gas, now I am getting 200 if I'm lucky.
Thanks in advance,
- 5.0L (305)
- 106,000 miles
- excellent condition
- extremely clean in/out
08-31-2012, 09:33 PM #2
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If gas mileage has also gone down that bad it might be the o2 sensors.
1996 Chevy Tahoe LT 5.7L V8 4X4 199,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
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08-31-2012, 09:42 PM #3
I can't say what the coincidence is that they all fail at the same time. You have 2 things to look at from your post. 1. The age of your truck and 2. the mileage.
I have 3 O2 sensors in my truck also. Left and Right near the cats and then one before the muffler. One of mine had failed and my truck is 1 year newer than yours, but I had 150,000 miles on it when the 1 O2 sensor failed. They basically get dirty, used, etc.
Most people will tell you to just replace the ones that fail. I decided that I wanted brand new sensors all the way around so I went ahead and bought 3 of them anyway. They were about $45 each at Advance Auto, Auto Zone, Pep Boys, Car Quest, Napa, or o'reilly auto parts.
I would get an O2 Sensor socket though, because they have a cable on them that a normal socket will not get around and the socket wrench will make it easier to remove than a crescent wrench.
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09-01-2012, 12:21 PM #4
Just to clear something up, have you ever had engine problems before? For example, I've heard a mechanic recommend changing out 02 sensors if a head gasket ever blows, due to coolant entering the exhaust and possibly contaminating the 02 sensors (depending on how long it was driven in that state). Hope that helps...
09-01-2012, 12:55 PM #5
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