Tech Tip: Infiniti EVAP Leak DTC Diagnosis - DTCs: P0440/P0442/P0455/P0456/P1440/P1456

Tech Tip: Infiniti EVAP Leak DTC Diagnosis – DTCs: P0440/P0442/P0455/P0456/P1440/P1456

Applied Vehicles: 1998 and later Infiniti ­vehicles with an EVAP service port.

DTCs: P0440, P0442, P0455, P0456, P1440 and P1456

If one or more of the DTCs listed above related to EVAP system leaks is found stored in Self Diagnosis, use the Repair Flow Chart shown in Fig. 1. Use the EVAP system diagram (Fig. 2) for reference.

This Service Procedure can be used in addition to the procedure(s) outlined in the applicable service manual, and other bulletins applicable to specific EVAP leak DTCs when necessary.

If a smoke (leak detection) machine is available and preferred, the Repair Flow Chart can still be used. This tool would be used in place of watching for a pressure drop and spraying with soapy water.

Caution: Use Essential Tool J-42909 or equivalent to pressurize the EVAP system. Do not pressurize over the amount specified in the applicable service manual. Do not use shop air pressure.

Note: If one or more EVAP system DTC(s) not related to EVAP leaks is/are found stored in Self Diagnosis, this bulletin does not apply. Refer to ASIST and the appropriate service manual for diagnostic procedure(s) as needed.

Courtesy of ALLDATA.

You May Also Like

Catalytic Converter Replacement Rules

The conditions under which the catalytic converter was installed is of great importance to the part manufacturer.

catalytic converter

The Environmental Protection Agency (EPA) enacted the Clean Air Act to reduce pollution in the late 1960s. Part of the act was to mandate the use of catalytic converters on new vehicles. As these emissions components required replacement, the Clean Air Act was revised to rules to also cover replacement catalytic components.

Oxygen Sensor Heater Codes

An oxygen sensor code related to the heater circuit can be difficult to cure.

Catalytic Converter Replacement

Converters must be certified and labeled with the correct codes that are stamped into the shell.

Determining Catalytic Converter Efficiency

Tiny details can limit the life of a catalytic converter.

Stainless Steel Did Not Kill The Exhaust Repair

Direct fit parts can be used to make an effective repair quickly.

Other Posts
MEYLE Expands Electronics, Sensor Product Portfolio

The focus is on assistance systems and engine and transmission management, with more than 300 new part numbers.

FCS Introduces 42 New Numbers in May

Complete strut assemblies, shock absorbers, shock absorber assembly kits and suspension struts for popular VIO applications are included.

Philips Ultinon Drive 5000 LED Lightbar Line Expands

Lumileds has expanded the Philips Ultinon Drive 5000 series to include eight models.

DMA Adds New BrakeMaster Coverage

New coverage for Ford and Chevy includes popular pickup trucks and SUVs.