P2AEA: Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 2

P2AEA reports a trim circuit voltage below the permitted range at the bank 2 intake O2 sensor. Likely culprits are a trim wire grounded where the harness passes the second turbocharger, or a damaged resistor inside the sensor connector. Ford's 2012 summary assigns the exhaust analog P2630 to NTK probes for an open or grounded RL lead, a reminder that a low reading need not mean a short. Engines with a separate bank 2 intake sensor are rare and no manufacturer documents P2AEA. If P2AE1 is stored too, look at what both sensors share, such as a ground point or the ECM; alone, P2AEA points to the bank 2 sensor and its own wiring. Meanwhile the EGR on that bank loses its oxygen feedback; the lamp comes on and NOx can rise, but the car usually drives normally. P2AE9 is the open, P2AEB the high fault.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

• Check engine light on
• Higher NOx, driveability usually unchanged

Most likely causes

• Trim lead grounded near the second turbocharger
• Calibration resistor in the plug damaged
• Fault in a ground or ECM path shared with bank 1

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. With the connector unplugged, check whether the signal wire is making contact with ground.
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 P2AEA means

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

Frequently asked questions

Can I keep driving with code P2AEA?

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 P2AEA?

The most common causes are: trim lead grounded near the second turbocharger; calibration resistor in the plug damaged; fault in a ground or ECM path shared with bank 1.

Related codes

• P2AE9Intake Air O2 Sensor Pumping Current Trim Circuit Open Bank 2
• P2AEBIntake Air O2 Sensor Pumping Current Trim Circuit High Bank 2
• P2AE1Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 1
• P2AEDIntake Air O2 Sensor Pumping Current Circuit Low Bank 2
• P2630O2 Sensor Pumping Current Trim Circuit Low (Bank 2 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.