What Does P2435 Mean?
The PCM has detected a fault in the secondary air injection system air flow or pressure sensor circuit on Bank 2. This is a general circuit malfunction code indicating the sensor signal is not functioning properly but doesn't specify whether high, low, or intermittent.
Common Causes
35%
Failed secondary air pressure/flow sensor
30%
Damaged wiring or connector to Bank 2 sensor
20%
Corroded or loose sensor connector
10%
Short or open in sensor signal circuit
5%
Failed PCM (rare)
Diagnostic Steps
1
Step 1: Visually inspect Bank 2 secondary air pressure sensor, connector, and wiring for damage, corrosion, or loose connections
2
Step 2: Check sensor signal voltage at the sensor connector with key on, engine off (typical range 0.5-4.5V)
3
Step 3: Verify sensor power supply (typically 5V reference) and ground circuits are functioning properly
4
Step 4: Test wiring continuity from sensor connector to PCM and check for shorts to ground or power
5
Step 5: If circuits test within specifications, replace Bank 2 secondary air pressure sensor and verify repair
Estimated Repair Cost
$150 - $400
Parts + labor, varies by vehicle and location
The PCM has detected a fault in the secondary air injection system air flow or pressure sensor circuit on Bank 2. This is a general circuit malfunction code indicating the sensor signal is not functioning properly but doesn't specify whether high, low, or intermittent.
The most common cause of P2435 (Secondary Air Injection System Air Flow/Pressure Sensor Circuit Bank 2) is: Failed secondary air pressure/flow sensor
Typical repair costs for P2435 range from $150 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. This fault affects emissions compliance and may cause increased cold-start emissions and failure of emissions testing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2435 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System - Secondary Air Injection
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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