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 computer has found a problem with a part that helps control the air going into the engine. It's like a switch that isn't working properly, so air can't go where it needs to.
The P0416 code is triggered when the Engine Control Module (ECM) detects an open circuit in the secondary air injection system's switching valve B. This system helps reduce emissions by injecting air into the exhaust stream.
The secondary air injection system is designed to reduce emissions by injecting fresh air into the exhaust stream to help burn off excess hydrocarbons. The system uses switching valves to control the flow of air. Code P0416 indicates that there is an open circuit in the electrical circuit of the switching valve B, meaning that the ECM is not receiving the expected signal from the valve.
• Check Engine Light is on
• Failed emissions test
• Possible decrease in engine performance
• Faulty AIR switching valve B
• Open or shorted wiring in the AIR system
• Faulty ECM
ECM: Engine Control Module
AIR System: Secondary Air Injection System
• Scan the vehicle for all codes and freeze frame data.
• Inspect the wiring and connectors for the AIR switching valve B.
• Test the AIR switching valve B for proper operation.
• Replace the faulty AIR switching valve B.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular maintenance and inspection of the AIR system.
• Ensure all electrical connections are secure and free of corrosion.
• Use quality replacement parts.
Emissions Control System
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle excessively until the issue is resolved.
• Regularly check for updates or recalls related to the AIR system.
Check with the vehicle manufacturer for any emissions-related warranties that may cover the repair.
The P0416 code has been more prevalent in vehicles with aging emissions systems, particularly in models from the early 2000s.
Moderate – While the vehicle may still be drivable, it may fail emissions tests and contribute to increased pollution.
Driving with a malfunctioning emissions system may violate local emissions laws.
• Engine at operating temperature
• Vehicle in closed-loop fuel control
The AIR switching valve B is typically located near the engine or exhaust system, often mounted on or near the intake manifold.
Q: Can I drive my car with a P0416 code?
A: Yes, but it's not recommended as it may lead to increased emissions and potential engine performance issues.
Q: How can I prevent a P0416 code?
A: Regular maintenance and inspection of the AIR system can help prevent this code from appearing.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.