P2AE1Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2AE1 is stored when the voltage on the trim circuit of the bank 1 intake oxygen sensor falls below its window. With the ignition on, the 2010 Saab 9-5 expects roughly 2.8 V on terminal 5 of its wide-band probe, the trim connection; a value near zero suggests a lead rubbing on ground or a shorted resistor in the sensor plug. Ford's 2012 summary shows how makers sort such faults differently: on NTK probes an open and a grounded trim lead (RL) both set the low code P2627, while on Bosch probes a grounded IA lead lands in P0131. No manufacturer publishes P2AE1 for an intake sensor. With the trim value missing, the EGR rate derived from the oxygen reading becomes unreliable, so recirculation is cut back. P2AE0 is the open, P2AE2 the high fault, P2AEA bank 2.
- What you may notice
- Check engine light on
- EGR cut back, possibly higher NOx
- Likely causes
- LikelyTrim lead chafed through to ground
- PossibleCalibration resistor in the sensor plug shorted
- RareOpen trim lead on sensors whose interface reports it as low
- 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.