P039A

Cylinder 1 Pressure Too Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Power Loss
Unstable engine operation
Increased fuel consumption
Misfires

Causes

Piston ring wear
Damage to valves
Compression leak
Spark plug fault
Problems with the fuel injector

How to Fix

Check compression in cylinder 1
Inspect the spark plug and fuel injector
Check the condition of valves and piston rings
Replace faulty components

Related codes

P0301 P0302 P0171 P0172