P2AE4Intake Air O2 Sensor Pumping Current Circuit Low Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2AE4 flags too low a level in the pumping current circuit belonging to the bank 1 intake sensor, usually a pump lead chafed through to ground or an internal short in the pump cell. Saab's 2010 9-5 gives a useful reference for the same wire on its exhaust probe: about 2.8 V on terminal 1 at ignition-on with the sensor unplugged, and its low code P2238 sets when the signal stays under 1.7 V for 3 s on overrun. Ford instead stores a grounded IP lead as P0131. No maker documents P2AE4 for an intake sensor. Because the ECM can no longer pump oxygen through the cell, it loses the value it compares with the zero point learned without EGR, and recirculation is reduced or switched off. P2AE3 is the open lead, P2AE5 the high side, P2AED bank 2.
- What you may notice
- Check engine light on
- EGR reduced or switched off
- Possibly higher NOx at an emissions test
- Likely causes
- LikelyPump current lead shorted to ground
- PossibleInternal short in the pump cell
- RareSensor interface in the ECM faulty
- 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.