Secondary Air Injection System Flow/Pressure Sensor Range/Performance Bank 2
The P2436 code indicates that the Engine Control Module (ECM) has detected a performance or range issue with the air flow/pressure sensor in the secondary air injection system on Bank 2. This system pumps fresh air into the exhaust to reduce emissions during cold starts. The sensor monitors air flow or pressure; when its signal is outside expected parameters, the code sets. Common causes include a faulty sensor, blocked air passages, failed pump, or wiring issues.
01. Most Common Causes
- Faulty secondary air injection pressure sensor
- Blocked or restricted air injection passages
- Failed secondary air injection pump
- Wiring or connector issues in the sensor circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Failed emissions test
- Rough idle or hesitation on cold start
- Possible reduced engine performance
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the secondary air injection system components and wiring.
Step 3: Test the pressure sensor signal with a multimeter or scan tool.
Step 4: Check for blockages in air injection hoses and passages.
Step 5: Verify pump operation by listening or using a vacuum gauge.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, but the vehicle may fail emissions testing and could experience rough idle or reduced performance. It's best to repair promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the root cause and labor rates.