Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's system that helps reduce pollution isn't working well because not enough air is being pushed into the engine. It's like trying to blow up a balloon but not having enough air.
The secondary air injection system helps reduce emissions by injecting air into the exhaust stream to help burn off excess fuel. When the flow is insufficient, it means the system isn't working properly.
The P140B code indicates that the secondary air injection system is not providing enough air flow to the exhaust system for both Bank 1 and Bank 2. This can be due to a blockage, malfunctioning pump, or issues with the control solenoids.
• Check Engine Light is on
• Failed emissions test
• Poor engine performance
• Faulty air injection pump
• Blocked air injection lines
• Malfunctioning air injection control solenoid
Secondary Air Injection System: A system that injects air into the exhaust to help burn off excess fuel and reduce emissions.
Bank 1: The side of the engine with cylinder number 1.
• Use an OBD-II scanner to confirm the code
• Inspect the air injection pump and lines for blockages or damage
• Test the air injection control solenoid for proper operation
• Replace the air injection pump if faulty
• Clear any blockages in the air injection lines
• Replace or repair the air injection control solenoid
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regularly inspect and maintain the air injection system
• Ensure air filters are clean and replaced as needed
• Perform routine emissions system checks
Emissions Control System Issue
• Get the vehicle inspected by a professional if the Check Engine Light comes on
• Avoid driving the vehicle excessively until the issue is resolved
Check with the vehicle manufacturer for emissions system warranty coverage.
This code has been associated with vehicles that have secondary air injection systems, which became more common in the late 1990s as emissions standards tightened.
Moderate – While the car may still run, it could fail emissions tests and cause long-term damage if not addressed.
Driving with a malfunctioning emissions system could result in fines or failing emissions tests in areas with strict regulations.
• Engine at operating temperature
• Vehicle at idle
The secondary air injection pump is usually located near the front of the engine bay, often on the passenger side.
Q: Can I drive with a P140B code?
A: It's possible to drive, but it's not recommended as it may lead to further emissions issues and potential fines.
Q: How do I clear a P140B code?
A: You can clear the code with an OBD-II scanner, but if the issue isn't fixed, the code will likely return.
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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.