Nissan P155b-00 -

For 90% of cases, the fix is replacing the coolant bypass valve assembly. Here’s how to do it:

The Nissan diagnostic code (often typed as P155) refers to a malfunction in the Heated Oxygen (O2) Sensor Heater Circuit (Bank 2, Sensor 1) nissan p155b-00

The engine's computer (ECM) detected an unexpected voltage or current draw in the heater circuit of the upstream O2 sensor on Bank 2. Bank 2 is the side of the engine that does For 90% of cases, the fix is replacing