P2439

AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Increase in harmful emissions
Unstable engine idling (in some cases)
Reduced secondary air system efficiency
Possible error codes related to the secondary air system

Causes

Damaged or dirty pressure/air flow sensor
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Engine control unit malfunction
Mechanical damage to the secondary air system

How to Fix

Check the integrity of the wiring harness to the sensor
Clean the contacts of the sensor connector
Check the functionality of the pressure/air flow sensor
Replace sensor if necessary
Check the operation of the secondary air system

Related codes

P2438 P2440 P0410