P2AED: Intake Air O2 Sensor Pumping Current Circuit Low Bank 2

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.

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

Symptoms

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

Most likely causes

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

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 P2AED means

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

Frequently asked questions

Can I keep driving with code P2AED?

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 P2AED?

The most common causes are: pump current lead grounded on the engine; breakdown inside the pump cell; eCM sensor interface faulty (likely if bank 1 also reports).

Related codes

• P2AECIntake Air O2 Sensor Pumping Current Circuit Open Bank 2
• P2AEEIntake Air O2 Sensor Pumping Current Circuit High Bank 2
• P2AE4Intake Air O2 Sensor Pumping Current Circuit Low Bank 1
• P2AEAIntake Air O2 Sensor Pumping Current Trim Circuit Low Bank 2
• P2241O2 Sensor Positive Current Control Circuit Low (Bank 2 Sensor 1)

Sources

• newtonnet.co.uk: fordobd2012
• saabwisonline.com: dtc p2237 p2239 p2243 p2251 or p2626
• 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.