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.
  • 5.0L (305)
  • 106,000 miles
  • excellent condition
  • extremely clean in/out