P1442 Mercury 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 Mercury 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.
Code P1442 Mercury Description
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.
What are the Possible Causes of the DTC P1442 Mercury?
- 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 Mercury?
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.
Code Tech Notes
1997-1999 Mercury Tracer
1997-2000 Mercury Mystique
1997-2003 Mercury Grand Marquis
1997-2003 Mercury Sable
1999-2002 Mercury Cougar
1997-2003 Mercury Mountaineer
Mercury Factory Service Bulletin OBDII Code P1442
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1442 Mercury 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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Need Help with the Code?
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Frequently Asked Questions about P1442 Mercury Code
No Frequently Asked Questions about P1442 Mercury Code found.
Discuss the causes and fixes for P1442 Mercury OBDII Code
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Have changed valve, Canister and tank hose. Light stayed out 7 days the came back same code. Any suggestions?
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What model and year is your vehicle? Sometimes small leaks can be difficult to find. Before replacing any other part, I recommend having a repair shop use a smoke machine to find the small leak. Have you check the gas cap?
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2004 Made the parts changes and the change it was 7 days before the light came back same code. Have had the code reset again to see how long before it reappears. thanks for your input, may have to get the smoke test.
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What model and year is your vehicle? Start by checking or replacing the gas cap.
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