01 Does replacing engine head gaskets extend the life of the e… • 02 The Fastest Way to Diagnose a No-Start Problem • 03 Who is at Fault When a Car Turns Right and a Bike Goes Stra… • 04 Can a Fuel Injector Cleaner Damage Your Engine? Here’s What… • 05 U0010 Medium Speed CAN Communication Bus • 06 EXPLAINER: ENGINE IMMOBILIZER. • 07 B0005 - In Park Switch Circuit Malfunction • 08 Car Won't Start or Running Rough? Don't Ignore a Faulty Cam… • 09 How to Bleed ABS Module Without a Scan Tool • 10 Understanding EGR: Problems, Troubleshooting, Repair, and S… •

DTC codes / P2Axx · Hybrid propulsion / P2AF0

P2AF0Intake Air O2 Sensor Negative Current Control Circuit Low Bank 2

P2AF0 indicates that the powertrain control module has detected an abnormally low negative current on the intake air oxygen sensor control circuit for bank 2. This sensor is a wideband air-fuel ratio sensor mounted before the catalytic converter, and the code means the circuit is not allowing the sensor's pump cell to draw the negative current the PCM commands.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaHybrid propulsion

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