P0442 Lincoln Code - Evaporative Emission System Leak Detected Small Leak
Quick Answer
The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for the following conditions: - Large and small leaks - Excess vacuum - Purge flow during non-commanded conditions - Fuel Level and Fuel Pressure sensor faults - EVAP Purge and Vent Valve faults The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0442 Lincoln indicates Evaporative Emission System Leak Detected Small Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0442 Lincoln Description
- Large and small leaks
- Excess vacuum
- Purge flow during non-commanded conditions
- Fuel Level and Fuel Pressure sensor faults
- EVAP Purge and Vent Valve faults
The ECM monitors the Fuel Tank Pressure sensor in order to determine the level of vacuum/pressure in the EVAP system. The ECM commands both the EVAP Purge Solenoid and the EVAP Vent Valve ON when the conditions are met in order to apply an engine vacuum to the EVAP system. The ECM commands the EVAP Purge Solenoid OFF once the system has reached a predetermined level of vacuum. This test verifies if a vacuum can be achieved in the EVAP system. Failure to develop a vacuum may be caused by a large leak or a restriction.
The Diagnostic Trouble Code (DTC) will set when a malfunction is detected when the EVAP control system has a leak, the EVAP control system does not operate properly.
What are the Possible Causes of the DTC P0442 Lincoln?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
How to Fix the DTC P0442 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.
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 P0442
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0442 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.
Need more information about the P0442 Lincoln code?
Need more information on how to fix the P0442 Lincoln code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0442 Lincoln code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0442 Lincoln Code
1. What are the common symptoms of OBDII code P0442 in a Lincoln?
Common symptoms include the illumination of the check engine light, a slight fuel odor around the vehicle, and potential issues with passing emissions tests.
2. What are the possible causes of OBDII code P0442 in a Lincoln?
Common causes of code P0442 include a loose or damaged gas cap, a cracked or damaged EVAP system hose, a faulty purge control valve, or a small leak in the evaporative emission system.
3. How serious is OBDII code P0442 in a Lincoln?
While code P0442 is not typically an urgent issue, it should not be ignored as it can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle's emissions system.
4. How can I diagnose OBDII code P0442 in my Lincoln?
Diagnosing code P0442 usually involves visually inspecting the gas cap and EVAP system components for any obvious signs of damage or leaks. A smoke test may also be performed to pinpoint the exact location of the leak.
5. Can I repair OBDII code P0442 in my Lincoln myself?
In some cases, repairing code P0442 may be as simple as tightening or replacing the gas cap. However, if the issue lies deeper within the EVAP system, it is recommended to seek the assistance of a professional mechanic for proper diagnosis and repair.
6. Will driving my Lincoln with OBDII code P0442 cause further damage?
Continuously driving with code P0442 may lead to increased emissions, reduced fuel efficiency, and potential damage to the vehicle's catalytic converter over time. It is best to address the issue promptly.
7. How much does it cost to repair OBDII code P0442 in a Lincoln?
The cost of repairing code P0442 can vary depending on the root cause of the issue. Simple fixes like replacing a gas cap may cost less than $50, while more complex repairs involving EVAP system components can range from $100 to $500 or more.
8. Can a Lincoln pass emissions testing with OBDII code P0442 present?
In most regions, a vehicle with an active OBDII code like P0442 will not pass emissions testing. It is recommended to address the issue and clear the code before attempting an emissions test.
9. How long does it take to repair OBDII code P0442 in a Lincoln?
The repair time for code P0442 can vary depending on the specific cause of the issue and the availability of replacement parts. Simple fixes like replacing a gas cap can be done in minutes, while more complex repairs may take a few hours.
10. Are there any preventive measures to avoid OBDII code P0442 in a Lincoln?
To prevent code P0442, ensure that the gas cap is always properly tightened after refueling, avoid topping off the fuel tank, and have the vehicle regularly inspected for any signs of EVAP system leaks or damage.
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