Powertrain, generic (extended)

P2AE2 Intake Air O2 Sensor Pumping Current Trim Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2AE2 means the voltage on the trim lead of the intake air O2 sensor for bank 1 is too high. In the six-wire harness of a wide-band probe this line runs next to the heater feed, so a pinched wire or moisture bridging the pins in the connector can drag it towards battery voltage. Ford's 2012 OBD summary books a trim lead shorted to battery as P2628 on NTK probes and under the general high code P0132 on Bosch probes; neither covers an intake sensor, and no manufacturer documents P2AE2 publicly. CARB requires input circuits to be checked for values beyond their range in both directions. According to Bosch the trimming resistor fixes the sensor characteristic, so a falsified value shifts the oxygen reading that EGR control relies on. Check plug and lead against battery voltage before fitting a new sensor. P2AE1 is low, P2AEB bank 2.

Likely causes

Trim lead touching the heater supply
Moisture bridging contacts in the sensor plug
Internal short in the sensor or its connector module

Symptoms

  • Check engine light on
  • EGR reduced, NOx may rise

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 b1wiring harnessecm

Related codes

P2AE0P2AE1P2AEBP2AE5P2628

References: newtonnet.co.uk, bosch-motorsport.com, law.cornell.edu.