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

P02EB Diesel Intake Air Flow A Control Motor Current Range/Performance

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. P02EB means the valve motor draws too much current – a shorted winding, a jammed valve drawing stall current or a short between the motor wires. GM's diesels set it above 5.5 A (LML: above 7.7 A for 2 s), two trips; the driver switches off. 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

Valve motor shorted internally or worn

Valve mechanically jammed (coking)

Short between the motor wires

Engine module or current measurement

Symptoms

Check engine light on
Often no noticeable change
Filter regeneration does not run, soot load rises

Repair estimate

DifficultyMediumDIY possible

Parts and labour€50–600

Time0.5–2.5 h

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

Parts involved

diesel intake throttle valvethrottle valve motoractuator wiring

Related codes

P02E0 P02E2 P02E3 P02E1 P2101

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