P039D

Cylinder 1 Pressure Variation High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Unstable engine operation
Power Loss
Increased fuel consumption
Misfires

Causes

Piston ring wear
Valve malfunction (burnout, coking)
Problems with fuel injectors
Low cylinder compression
Faulty spark plugs or coils
Problems with timing (valve timing)

How to Fix

Check compression in cylinders
Inspect spark plugs and coils
Check the condition of valves and piston rings
Test fuel injectors
Check the operation of the variable valve timing (VVT) system

Related codes

P0301 P0302 P0303 P0304