01 The Ultimate Guide to the Major Automotive Groups and Their… • 02 These Warnings Can Prevent Breakdowns And Extend Your Vehic… • 03 Engine Thirst: Identifying the Sounds of a Car in Need of O… • 04 You Could Destroy Your Entire Engine If You Keep Repeating … • 05 GM's Oshawa Plant Gets a C$280M Boost for Next-Gen HD Picku… • 06 What Happens If You Drop The Anchor At Full Speed? • 07 The Single Component Under Your Hood That Could Be Draining… • 08 VW Touareg vs. VW Tiguan: The Ultimate German Off-Road Batt… • 09 The Dangers of Driving on Low Fuel: Risks and Consequences … • 10 How EVs are Reshaping Auto Repairs and Opening Doors for Me… •

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2255

P2255O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)

P2255 means the engine computer has detected that the heater control circuit for the upstream oxygen sensor on bank 2 is drawing too little current, which usually indicates an open circuit or high resistance in the sensor heater or its wiring. The computer monitors the current flow through the sensor's heater element and sets this code when the negative-side control circuit reports a low current condition.

SystemPowertrain
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage