Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car that checks for leaks in the gas tank system. It's like a sensor isn't getting enough power to work properly.
The P1442 code indicates that the control circuit for the leakage diagnostic pump is receiving a low voltage signal, which can affect the vehicle's ability to test for evaporative emissions system leaks.
The Leakage Diagnostic Pump is part of the vehicle's evaporative emissions control system. It pressurizes the system to check for leaks. A 'Control Circuit Low' error suggests that the electrical circuit controlling the pump is not receiving sufficient voltage, which can prevent the pump from operating correctly.
• Check Engine Light is on
• Failed emissions test
• Possible fuel smell
• Faulty leakage diagnostic pump
• Wiring issues such as shorts or open circuits
• Faulty control module
• Corroded or loose electrical connections
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics and reporting.
Evaporative Emissions System: A system in vehicles designed to prevent fuel vapors from escaping into the atmosphere.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for the leakage diagnostic pump for damage or corrosion.
• Test the voltage at the pump to ensure it is receiving proper power.
• Check the control module for faults.
• Repair or replace damaged wiring or connectors.
• Replace the leakage diagnostic pump if faulty.
• Replace or reprogram the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly inspect and maintain the vehicle's wiring and connectors.
• Perform routine checks of the emissions control system.
• Ensure timely replacement of faulty components.
Sensor Issue
• Address the issue promptly to avoid failing emissions tests.
• Consult a professional mechanic if unsure about repairs.
Check if the vehicle's emissions system components are covered under warranty.
This code has been associated with vehicles that have aging emissions systems, particularly in regions with strict emissions standards.
Moderate – While the vehicle may still operate normally, addressing this issue is important for emissions compliance and environmental reasons.
Ignoring emissions-related issues can lead to fines and increased environmental pollution.
• Vehicle at operating temperature
• Properly functioning battery and charging system
The leakage diagnostic pump is typically located near the fuel tank or within the evaporative emissions system components.
Q: Can I drive with a P1442 code?
A: Yes, but it's recommended to fix it soon to avoid emissions test failure.
Q: Will a P1442 code affect my car's performance?
A: It may not affect performance directly, but it can lead to emissions issues.
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Universal · Digital multimeter
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.