Powertrain, generic (extended)

P2AED Intake Air O2 Sensor Pumping Current Circuit Low Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2AED stands for a pumping current circuit on the bank 2 intake oxygen sensor that reads below its limit. A pump lead grounded on the engine or a breakdown inside the pump cell are the usual reasons. On exhaust probes Ford stores such a short for bank 2 under the general low code P0151 rather than a dedicated pump code, and Saab's 9-5 (2010) expects about 2.8 V on the pump terminal at ignition-on with the sensor disconnected. No manufacturer documents P2AED, and an engine using it would need one intake sensor per bank. If bank 1 reports P2AE4 at the same time, a common cause such as the ECM interface is more likely than two damaged leads. The EGR on bank 2 loses its oxygen feedback, so the ECM limits recirculation. P2AEC is the open, P2AEE the high fault, P2AE4 bank 1.

Likely causes

Pump current lead grounded on the engine
Breakdown inside the pump cell
ECM sensor interface faulty (likely if bank 1 also reports)

Symptoms

  • Check engine light on
  • EGR on bank 2 limited, possibly higher NOx

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–350
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

intake air o2 sensor b2wiring harnessecm

Related codes

P2AECP2AEEP2AE4P2AEAP2241

References: newtonnet.co.uk, saabwisonline.com, law.cornell.edu.