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 helper pump that blows air to help clean the exhaust. It's not working well on one side of the engine.
The secondary air injection system helps reduce emissions by injecting air into the exhaust stream. Code P145F indicates that the system's performance is too low on Bank 2.
The P145F code is triggered when the Engine Control Module (ECM) detects that the secondary air injection system's performance is below the expected level on Bank 2. This could be due to a malfunctioning air pump, a clogged air line, or a faulty check valve.
• Check Engine Light illuminated
• Failed emissions test
• Unusual noises from the air pump
• Faulty secondary air pump
• Clogged or leaking air lines
• Malfunctioning check valve
ECM: Engine Control Module, the computer that controls engine functions.
Bank 2: The side of the engine opposite Bank 1, usually the side without cylinder 1.
• Scan the vehicle for additional codes.
• Inspect the secondary air pump and related hoses for damage or leaks.
• Test the operation of the air pump and check valve.
• Replace the secondary air pump if faulty.
• Repair or replace damaged hoses.
• Replace the check valve if it's not functioning correctly.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 3 Series
• Mercedes-Benz C-Class
• Audi A4
• Regularly inspect and maintain air injection components.
• Ensure all hoses and connections are secure.
• Perform regular emissions tests.
Engine Performance
• Address the issue promptly to avoid emissions test failures.
• Consult a professional mechanic if unsure about the repair.
Check with the vehicle manufacturer for emissions-related warranty coverage.
The secondary air injection system has been used in vehicles to help meet emissions standards since the 1990s.
Moderate – While not immediately critical, addressing this issue is important for emissions compliance.
Operating a vehicle with a malfunctioning emissions system may be illegal in some regions and can contribute to environmental pollution.
• Engine at operating temperature
• System activation during cold start
The secondary air pump is typically located near the front of the engine bay, often on the passenger side.
Q: Can I drive with a P145F code?
A: While the car may still drive, it's best to fix the issue to pass emissions tests and avoid potential damage.
Q: What happens if I ignore this code?
A: Ignoring it can lead to failed emissions tests and possible damage to the catalytic converter.
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