P02E2

Diesel Intake Air Flow A Control Circuit Low

Q: Is it safe to drive with P02E2?

Short trips are usually fine, but the engine may limit power. Have the circuit diagnosed before relying on the vehicle.

Q: Can I just clear P02E2?

It returns until the low-voltage circuit fault at the intake air-flow control actuator is repaired.

Diesel intake air control Generic OBD-II High

What it means

P02E2 is a diesel code meaning the ECM sees a low-voltage (shorted or open) fault in the control circuit for the intake air-flow control actuator — the motorized valve that regulates air entering the intake, used for EGR flow and smooth engine shutdown. It's an electrical fault in the actuator circuit, so the engine may drop into reduced-power mode. Start with the actuator wiring and connector before replacing the actuator itself.

High

Can I keep driving? Drivable but may be down on power or in limp mode — the intake air-flow control actuator circuit is faulty, so get it diagnosed before hard use.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Reduced power or limp/failsafe mode
Rough running or hesitation
Rough or uneven shutdown

Common causes

Most likely first

Short-to-ground or low-voltage fault in the intake air-flow control actuator circuitLikely
Corroded or loose connector at the actuatorCommon
Faulty intake air-flow control actuator/motorCommon
Failed ECM / actuator driver (rare — verify wiring first)Less often

How to diagnose & fix

Work through it in order

Scan and read freeze-frame data to confirm the circuit is reading low (shorted or open).
Inspect the actuator connector and wiring for shorts, chafing, and corrosion.
Measure the actuator's control-circuit voltage and the motor's resistance against spec.
Confirm the actuator moves freely and isn't seized or carboned up; replace it if faulty.
Only after the wiring and actuator check out, consider the ECM/driver. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P02E2?+

Short trips are usually fine, but the engine may limit power. Have the circuit diagnosed before relying on the vehicle.

Can I just clear P02E2?+

It returns until the low-voltage circuit fault at the intake air-flow control actuator is repaired.

Read & clear P02E2 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX