P2AEC Intake Air O2 Sensor Pumping Current Circuit Open Bank 2

P2AEC means the pumping current wire of the second-bank intake oxygen sensor is interrupted. On a Bosch-style element the ECM uses this lead to push oxygen into or out of the measuring gap until the Nernst cell is balanced; the current needed is the oxygen signal. Ford's intake EGR patent US9441564B2 derives the recirculated share from the change in that current relative to operation without EGR, so an open lead removes the whole basis. For bank 2 exhaust probes Ford uses P2240, found by a lambda that hardly moves under test pulses. No manufacturer has published P2AEC or an engine fitted with a separate bank 2 intake sensor. Look first at wiring routed near hot exhaust parts of that bank. P2AED/P2AEE are low/high, P2AEF the open return, P2AE3 bank 1.

Likely causes

Symptoms

• Check engine light on
• EGR on bank 2 without feedback or switched off

Repair estimate

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

Parts involved

Related codes

References: patents.google.com, newtonnet.co.uk, law.cornell.edu.