P054E — Idle Control System - Fuel Quantity Lower Than Expected

P054E: Idle Control System - Fuel Quantity Lower Than Expected — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Idle Control System - Fuel Quantity Lower Than Expected. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • Warning light may illuminate
  • Related system function may be impaired
  • Vehicle-specific symptoms vary

Possible causes

  • Fuel supply or pressure issue, restricted injector, actuator fault, connector or wiring damage
  • Related wiring, connector, power or ground fault
  • Vehicle-specific mechanical or control issue

What to check

  • Record stored and pending codes and freeze-frame data
  • Check fuel supply and pressure readings, electrical supply and ground, and the relevant injector or regulator circuit before replacing parts.
  • Confirm measured values against the vehicle service information
  • Retest under the conditions that set the code
  • Check fuel supply and pressure readings, electrical supply and ground, and the relevant injector or regulator circuit before replacing parts.
  • Repair the verified cause and confirm the code does not return

Also written as: P054E-00, P054E00, PO54E (some scan tools add the fault-type byte, e.g. -00).