P03D9

Cylinder 7 Pressure Variation High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Vibrations at idle

Causes

Malfunction of the fuel injector of cylinder 7
Problems with the ignition system (plugs, coils)
Low compression in cylinder 7
Valve contamination or damage
Problems with the cylinder pressure sensor

How to Fix

Check the condition of the spark plug and coil in cylinder 7
Test the fuel injector of cylinder 7
Measure compression in cylinder 7
Check valve tightness
Diagnose the cylinder pressure sensor

Related codes

P0307 P0172 P0175