P039B

Cylinder 1 Pressure Too High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Floating idle speed
Power Loss
Detonation (engine knocking)
Increased fuel consumption
Misfires

Causes

Fuel injector malfunction (fuel overflow)
Problems with the ignition system (plugs, coils)
Mechanical damage to the cylinder (wear of piston rings, valves)
Incorrect operation of the VVT system
Cylinder pressure sensor dirty or faulty

How to Fix

Check the condition of the fuel injectors, replace if necessary
Diagnose the ignition system (spark plugs, coils)
Check compression in cylinders
Scan the VVT system for errors
Clean or replace cylinder pressure sensor

Related codes

P0301 P0302 P0303 P0304 P0172