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

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.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

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

Most likely causes

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

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the wiring and connector of the sensor indicated
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Look for exhaust leaks
4. Check the signal in live data with the engine warm
5. Check the fuse and the heater resistance if the code mentions it
6. Replace the sensor if it has power and does not respond

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2AE2 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• A: Hybrid or air and fuel
• E2: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2AE2?

Yes, you can normally drive in moderation, but get it repaired soon: you will use more fuel and the catalytic converter can be damaged over time.

What causes code P2AE2?

The most common causes are: trim lead touching the heater supply; moisture bridging contacts in the sensor plug; internal short in the sensor or its connector module.

Related codes

• P2AE0Intake Air O2 Sensor Pumping Current Trim Circuit Open Bank 1
• P2AE1Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 1
• P2AEBIntake Air O2 Sensor Pumping Current Trim Circuit High Bank 2
• P2AE5Intake Air O2 Sensor Pumping Current Circuit High Bank 1
• P2628O2 Sensor Pumping Current Trim Circuit High (Bank 1 Sensor 1)

Sources

• newtonnet.co.uk: fordobd2012
• bosch-motorsport.com: Data Sheet 69034379 Lambda Sensor LSU 4.9
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.