What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P04ECEVAP System Large Leak Detected - Fuel Tank SideP04ECEVAP System Large Leak - Fuel Tank Side (PHEV only)P04ECEVAP System Large Leak Detected - Fuel Tank SideP04ECEVAP System Large Leak Detected - Fuel Tank SideManufacturer communications
6Original wording in English
JEEP
Reported code forms P04EC
Fuel Filler Cap Tether Too Long Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes…
DODGE, JEEP, RAM
Reported code forms P04EC
Updated Fuel Filler Cap This bulletin involves updating the fuel filler cap with improved version. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may…
JEEP
Reported code forms P04EC
Updated Fuel Filler Cap and Fuel Filler Tube This bulletin involves updating the upper fuel filler tube and cap with improved versions. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon…
JEEP
Reported code forms P04EC
Updated Fuel Filler Cap and Fuel Filler Tube This bulletin involves updating the upper fuel filler tube and cap with improved versions. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon…
JEEP
Reported code forms P04EC
Customer complaint includes a Mil-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM: P0456 - EVAP System Small Leak P0455 - EVAP System Large Leak P04EC - EVAP…
JEEP
Reported code forms P04EC
Customer complaint includes a Mil-on condition. Upon further investigation, one or more of the following fault codes may be set in the PCM: P0456 - EVAP System Small Leak P0455 - EVAP System Large Leak P04EC - EVAP…
Check vehicle applicability
12A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.