01 P0056 – O2 Heater Circuit Fault (Bank 2 Sensor 2): Diagnosi… • 02 What Happens If You Ignore A Check Engine Light For Too Long • 03 The Sneaky Mechanical Piece That Increases Fuel Consumption… • 04 What Happens If You Don't Change the Oil in Your Car? • 05 Why Does Your Transmission Stop Working When It Gets Hot? • 06 This Is Why Your Car’s Rear Passengers Are Protected • 07 Why A Car That Randomly Jerks Forward Might Be Warning Of T… • 08 Experts Say Most People Use Air Conditioning Wrong And It's… • 09 How Cold Weather Affects Your Car Battery • 10 Mechanics Shocked At How Many Cars Are Destroyed By Owners … •

DTC codes / P28xx · Transmission / P28A6

P28A6Cylinder 6 Ion Current Sense Circuit Low

P28A6 indicates that the engine control module (ECM) has detected an abnormally low voltage on the ion current sense circuit for cylinder 6, which is used to monitor combustion quality. The ECM expects a specific voltage range during the ion current measurement window, and a low reading suggests a short to ground, a faulty sensor, or a wiring issue.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaTransmission

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