B3749

Air Flow Control 7 Feedback Circuit Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Reduced engine power
Check engine light comes on

Causes

Malfunction of the mass air flow sensor (MAF)
Wiring harness damage
Engine control unit malfunction
Throttle valve contamination

How to Fix

Check the mass air flow sensor (MAF)
Inspect the wiring harness for damage
Check the operation of the engine control unit
Clean throttle body

Related codes

P0101 P0102 P0103