AutoCodes – Lincoln – P1442 Lincoln

P1442 Lincoln Code - EVAP System Small Leak Detected

Quick Answer

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using an engine intake manifold vacuum. Common causes include Open or faulty gas cap, Small leak in EVAP system-Check vent solenoid, Faulty hose connection or leak in line. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1442 Lincoln indicates EVAP System Small Leak Detected.
Common causes: Common causes include Open or faulty gas cap, Small leak in EVAP system-Check vent solenoid, Faulty hose connection or leak in line.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,827

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 25, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P1442 Lincoln Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using an engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
The Diagnostic Trouble Code (DTC) will set when the EVAP control system has a small leak such as the loose fuel filler cap, the EVAP control system does not operate properly.

OBDII Code P1442 Lincoln - EVAP System Small Leak Detected - AutoCodes.com — P1442 Lincoln Code - EVAP System Small Leak Detected

What does this mean?

What are the Possible Causes of the DTC P1442 Lincoln?

Open or faulty gas cap
Small leak in EVAP system-Check vent solenoid
Faulty hose connection or leak in line

How to Fix the DTC P1442 Lincoln?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a factory service bulletin for the following Lincoln vehicles:
1997-1998 Lincoln Mark VIII
1997-2002 Lincoln Continental
1997-2003 Lincoln Town Car
2000-2003 Lincoln LS
1998-2003 Lincoln Navigator
2002-2003 Lincoln Blackwood
Lincoln Factory Service Bulletin OBDII Code P1442

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1442 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.