Question

What do the codes P22b5, P2270, and P2000 mean on my 2012 Ram 2500 6.7 Diesel?

Answer 1

All the codes indicate that you have a problem with the Downstream (Sensor 2 or Rear) Oxygen Sensor. Replacing the sensor is necessary to repair the problem.

P22B5 RAM Code - O2 Sensor Bank 1 Sensor 2 Pump Cell Current Trim Circuit Open
Read more: https://www.autocodes.com/p22b5_ram.html

P2000 RAM Code - Oxides Of Nitrogen Efficiency Below Threshold
Read more: https://www.autocodes.com/p2000_ram.html

P2270 RAM Code - O2 Sensor 1/2 Signal Biased Lean
Read more: https://www.autocodes.com/p2270_ram.html