P054E

Idle Control System - Fuel Quantity Lower Than Expected

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable idle
Floating speed
Dips during acceleration
Increased fuel consumption

Causes

Dirty or faulty throttle valve
Malfunction of the mass air flow sensor (MAF)
Leaks in the air intake system
Low fuel pressure
Clogged fuel injectors
Throttle Position Sensor Malfunction
ECU software error

How to Fix

Check the condition of the throttle valve, clean if necessary
Check the readings of the mass air flow sensor and throttle position sensor
Check the tightness of the intake system for leaks
Measure fuel pressure
Check the condition of the fuel injectors
If necessary, update the ECU firmware

Related codes

P0128 P0171 P0172 P0505 P0506