P054F

Idle Control System - Fuel Quantity Higher Than Expected

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable idle
Increased fuel consumption
Reduced engine power
Black smoke from the exhaust pipe

Causes

Dirty or faulty throttle valve
Vacuum leaks in the intake manifold
Malfunction of the mass air flow sensor (MAF)
Clogged fuel injectors
Low fuel pressure
Problems with oxygen sensors
ECU software error

How to Fix

Diagnostics of the idle system
Checking the tightness of the intake tract
Cleaning or replacing the throttle valve
Diagnostics of mass air flow sensor and oxygen sensors
Checking fuel pressure and injector condition
Resetting idle speed adaptations
Updating the ECU firmware if necessary

Related codes

P0507 P0172 P2188 P0101