P2AE6Intake Air O2 Sensor Negative Current Control Circuit Open Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2AE6 points to an open negative current control line on the bank 1 intake air oxygen sensor. This is the shared return of pump and Nernst cell, which Bosch names virtual ground (IPN/VM, pin 2); Saab's 2010 9-5 shows about 2.5 V on it at ignition-on, a bias that lets the pump current change direction. For the exhaust analog P2251, Ford separates an open VM from an open pump lead: lambda still reacts to reference-current pulses, and with the Bosch CJ125 chip the fault sets when for 10 s the sensor voltage remains between 1.45 and 1.55 V. No manufacturer publishes P2AE6 for the intake sensor. With the return missing, neither cell has a defined reference, the oxygen value is lost and EGR runs without feedback. P2AE7/P2AE8 are low/high, P2AE3 the open pump lead, P2AEF bank 2.
- What you may notice
- Check engine light on
- EGR runs without oxygen feedback
- Likely causes
- LikelyVirtual-ground return lead (pin 2) broken
- PossibleCorroded or loose return contact in the plug
- RareInternal break of the common electrode in the sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.