P2393

Diesel Intake Air Flow B Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Deterioration of engine performance
Increased fuel consumption
Increased emissions of harmful substances
Check Engine Light Illuminates
Reduced engine power

Causes

Air flow sensor malfunction
Open or short circuit in control circuit
Damage to connectors or corrosion of contacts
Engine control unit malfunction
Mechanical damage to intake system elements

How to Fix

Check the integrity of the control circuit
Inspect connectors and contacts for damage
Check the functionality of the air flow sensor
If necessary, replace the sensor or repair the wiring
Test the system after repair

Related codes

P2390 P2391 P2392