P2445
Secondary Air Injection System Pump Stuck Off Bank 1
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The P2445 code indicates that the secondary air injection pump for Bank 1 is not operating when commanded by the PCM. During cold starts, the PCM activates the air pump to push fresh air into the exhaust manifold, but the pump is not responding. This means Bank 1's catalytic converter is not receiving the extra air it needs to warm up efficiently.
The most obvious symptom is the absence of the normal air pump sound during cold starts. Most drivers are accustomed to a brief whirring or humming sound for the first minute after starting a cold engine — if this disappears, the pump may have failed. Cold starts will be rougher, and you may notice a richer exhaust smell. Your vehicle will fail an emissions test.
Start with the simplest checks: examine the air pump fuse and relay. A blown fuse is a $1 fix, but if the fuse blows again immediately, it indicates the pump motor has an internal short and needs replacement. Try swapping the relay with an identical one from another circuit. If power is reaching the pump but it does not run, the pump motor has failed. On many vehicles, the pump is located in the engine bay and can be replaced with basic hand tools, though access varies significantly by make and model.
Severity
Symptoms
- •Check Engine Light is on
- •No air pump noise during cold start
- •Longer engine warm-up time
- •Rough cold-start idle
- •Failed emissions test
- •Rich exhaust smell during cold operation
Likely Causes
The air pump motor has burned out, seized, or failed internally and cannot operate.
A blown fuse or failed relay in the air pump circuit prevents the pump from receiving power.
A broken wire or disconnected connector in the pump power or control circuit prevents the pump from energizing.
The solenoid or relay that switches power to the pump is not activating when commanded.
The PCM's internal circuit that commands the air pump relay has failed, so no activation signal is sent.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace secondary air injection pump
- Replace blown fuse or failed relay
- Repair open circuit in pump wiring
- Replace pump control solenoid
- Diagnose and replace PCM if necessary
Shop Parts
Videos
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