P02FA: Diesel Intake Air Flow Position Sensor Minimum/Maximum Stop Performance

The diesel intake throttle learns the position sensor values of its end stops, as a Toyota patent describes for the closed stop at engine stop. P02FA means a learned end-stop value is implausible. Ford's 6.7 and 3.0 diesels check it once after each learning run and set the code when the learned minimum offset is outside ±10 (6.7) or ±6.7 (3.0) – Ford only evaluates the minimum stop. Typical causes are soot and oil deposits at the flap and stop, a worn or shifted sensor, mechanical damage or a replacement part that has not been learned. EGR control may be restricted.

Symptoms

• Check engine light on
• Often no noticeable driving problems
• EGR control restricted, filter regeneration hindered

Most likely causes

• Soot and oil deposits at flap and stop (EGR, crankcase ventilation)
• Position sensor in the throttle unit worn or shifted
• Flap or shaft bent, stop worn, gear worn
• Wrong or not learned replacement part
• Engine software

What to check, in order

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

1. Check the vacuum hoses and the connector
2. Compare the reading with other engine data while varying the engine speed.
3. Watch the actuator's movement with the scanner
4. Inspect the manifold for carbon buildup
5. Replace the actuator if it does not follow the command

Good to know

• Repair difficulty: medium
• It can trigger limp mode.
• It affects emissions.

What each character of P02FA means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 2: Fuel injection
• FA: Specific fault in that system

Frequently asked questions

Can I keep driving with code P02FA?

You can drive in moderation. Get it repaired soon, because a loose flap can cause major damage on some engines.

What causes code P02FA?

The most common causes are: soot and oil deposits at flap and stop (EGR, crankcase ventilation); position sensor in the throttle unit worn or shifted; flap or shaft bent, stop worn, gear worn.

Related codes

• P02E7Diesel Intake Air Flow A Position Sensor Circuit Range/Performance
• P02E8Diesel Intake Air Flow A Position Sensor Circuit Low
• P02E9Diesel Intake Air Flow A Position Sensor Circuit High
• P02E4Diesel Intake Air Flow A Control Stuck Open
• P02E5Diesel Intake Air Flow A Control Stuck Closed
• P02E1Diesel Intake Air Flow A Control Performance

Sources

• fordservicecontent.com: obd summary diesel 2023
• patents.google.com: US6209515

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.