Powertrain, generic · Fuel and air metering (injector circuit)

P02EA Diesel Intake Air Flow A Position Sensor Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The diesel intake air flow valve A is the throttle flap ahead of the intake manifold of a diesel engine: it creates the vacuum needed for high EGR rates, lowers airflow to heat the particulate filter and catalyst during regeneration and closes at switch-off against run-on shaking. A spring holds it open when unpowered; an electric motor positions it, with a position sensor reporting back. P02EA reports brief dropouts or jumps of the position signal – loose contacts, a wire breaking under movement or faulty digital sensor messages. No manufacturer using P02EA was found – GM reports such faults under its own codes, Ford does not use it – so the description follows CARB's input monitoring requirement. On a fault the valve is switched off and the spring opens it: driving is usually little affected, but EGR control is restricted and filter regeneration may be blocked.

Likely causes

Loose contact at connector or pins
Wire breaking under movement
Sensor with dropouts
Electromagnetic interference

Symptoms

  • Check engine light (possibly intermittent)
  • Valve occasionally switched off
  • Irregular regeneration

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–500
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

diesel intake throttle position sensordiesel intake throttle valvesensor wiring

Related codes

P02E8P02E9P02E7P02E6P0124

References: law.cornell.edu, gsi.ext.gm.com.