Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system that helps clean the air coming out of the engine. This code means that system isn't working well enough on both sides of the engine.
The secondary air injection system helps reduce emissions by injecting air into the exhaust stream to help burn off excess fuel. This code indicates that the system is not providing enough air flow to both banks of the engine.
The P140A code is triggered when the Engine Control Module (ECM) detects that the secondary air injection system is not providing the expected amount of air flow to both Bank 1 and Bank 2. This could be due to a blockage, a malfunctioning pump, or a leak in the system.
• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Blocked air injection pump
• Faulty air injection valve
• Leaking air hoses
ECM: Engine Control Module
Bank 1: The side of the engine with cylinder 1
Bank 2: The opposite side of the engine from Bank 1
• Check for any other related codes
• Inspect the air injection pump and hoses for blockages or leaks
• Test the air injection valves for proper operation
• Replace or clean the air injection pump
• Repair or replace leaking hoses
• Replace faulty air injection valves
• OBD-II scanner
• Multimeter
• Vacuum pump
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Keep air filters clean
• Inspect hoses for wear and tear
Emission Control System Issue
• Do not ignore the Check Engine Light
• Have the vehicle inspected by a professional
• Avoid driving with this issue for extended periods
Check your vehicle's warranty for emissions-related coverage.
This code has been more common in vehicles with aging emission systems, especially those with high mileage.
Moderate – While not immediately harmful, it should be addressed to prevent increased emissions and potential engine performance issues.
Driving with a malfunctioning emission system can lead to failing emission tests and increased pollution.
• Engine running
• System warmed up
The secondary air injection system components are typically located near the front of the engine bay, close to the exhaust manifold.
Q: Can I drive my car with a P140A code?
A: While you can drive with this code, it's best to get it fixed soon to avoid increased emissions and potential engine issues.
Q: What happens if I ignore the P140A code?
A: Ignoring this code can lead to higher emissions, potential engine performance problems, and failing an emissions test.
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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 for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
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.