Secondary Air Injection Pump Stuck Off (Bank 1)
The P2445 code indicates that the secondary air injection (SAI) system pump on Bank 1 is not operating when commanded by the engine control module (ECM). The SAI system pumps fresh air into the exhaust during cold starts to reduce emissions by helping the catalytic converter reach operating temperature faster. When the pump fails to turn on, it can cause increased emissions and may trigger the check engine light.
1. Most Common Causes
- Secondary air injection pump seized or internally damaged
- Faulty SAI pump relay
- Blown secondary air injection system fuse
- Short, open, or high resistance in pump circuit wiring
- Stuck or leaking air control valve or switching solenoid
- Defective secondary air flow or pressure sensor
- Corroded electrical connections or bent pins at pump connector
- Water or debris ingress into pump air intake
2. Symptoms You Will Notice
- Check engine light illuminated
- Failed emissions test
- Possible rough idle or hesitation on cold start
- Unusual noise from the pump area (if pump is seized)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes (e.g., P2440-P2444).
Step 2: Inspect the SAI pump relay and fuse; test for power and ground at the pump connector.
Step 3: Check the pump motor by applying direct battery voltage; if it doesn't run, replace the pump.
Step 4: Inspect wiring and connectors for damage, corrosion, or loose connections.
Step 5: If all else is fine, test the ECM output signal to the pump relay.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is generally safe to drive short distances, but the vehicle may fail an emissions test and the check engine light will remain on. Prolonged driving could cause the catalytic converter to overheat or become damaged due to improper warm-up.
How much does it cost to fix?▼
The cost to fix P2445 typically ranges from $50 to $150 for parts and labor, depending on the cause. A replacement SAI pump can cost $100-$300, but often the issue is a simple relay or fuse replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.