Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car has a system that helps clean the air coming out of the engine. This code means that the air isn't flowing the way it should be, like when a straw is blocked and you can't drink your juice.
The secondary air injection system is designed to reduce emissions by injecting air into the exhaust stream. This code indicates that the flow of air in System B is not as expected.
The P25F7 code is triggered when the powertrain control module (PCM) detects an incorrect flow within the secondary air injection system B. This system is responsible for injecting fresh air into the exhaust to help reduce emissions. The incorrect flow can be due to blockages, leaks, or faulty components.
• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Blocked air injection pump
• Faulty air injection check valve
• Leaking or damaged hoses
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code
• Inspect the air injection pump and hoses for blockages or damage
• Test the air injection check valve for proper operation
• Clean or replace the air injection pump
• Replace faulty air injection check valve
• Repair or replace damaged hoses
• OBD-II scanner
• Multimeter
• Vacuum pump
$150 - $500
Moderate
• Toyota Camry
• Chevrolet Silverado
• Ford F-150
• Regularly inspect and maintain the air injection system
• Ensure hoses are free from blockages
• Use quality fuel to prevent deposits
Emission Control System
• Get the issue checked as soon as possible to avoid increased emissions.
• Avoid driving the vehicle extensively until the issue is resolved.
Check with your vehicle manufacturer; emissions-related components may have an extended warranty.
This code has been more common in vehicles with aging emission systems and is often related to environmental conditions affecting the air injection system.
Moderate – While it may not affect immediate drivability, it can lead to increased emissions and potential engine performance issues.
Driving with this code can lead to failing emissions tests and is not environmentally friendly.
• Cold engine start
• Vehicle idling
The secondary air injection system is typically located near the front of the engine bay, connected to the exhaust manifold.
Q: Can I drive my car with a P25F7 code?
A: It's possible to drive, but it's not recommended as it can lead to increased emissions and potential engine issues.
Q: How can I prevent a P25F7 code?
A: Regular maintenance of the air injection system and using quality fuel can help prevent this issue.
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.