What Does P1414 Mean?
The secondary air injection system monitor circuit is reading abnormally high voltage. This indicates a potential open circuit, short to voltage, or sensor malfunction in the air injection system monitoring circuit.
Common Causes
35%
Shorted or open wiring in secondary air monitor circuit
30%
Faulty secondary air pressure sensor or switch
20%
Damaged or corroded connector at monitoring sensor
10%
Failed secondary air bypass valve or control solenoid
5%
PCM internal voltage reference issue
Diagnostic Steps
1
Step 1: Inspect secondary air system monitor sensor/switch connector for damage or corrosion
2
Step 2: Measure voltage at monitor circuit signal wire (should typically be 0.5-1.5V at idle, higher when SAI active)
3
Step 3: Check for shorts to voltage by disconnecting sensor and testing circuit voltage (should drop to near 0V)
4
Step 4: Test sensor/switch operation by applying vacuum or pressure and monitoring voltage change
5
Step 5: Verify 5V reference voltage from PCM is stable and within specification
Estimated Repair Cost
$120 - $400
Parts + labor, varies by vehicle and location
The secondary air injection system monitor circuit is reading abnormally high voltage. This indicates a potential open circuit, short to voltage, or sensor malfunction in the air injection system monitoring circuit.
The most common cause of P1414 (Secondary Air Injection System Monitor circuit High Voltage) is: Shorted or open wiring in secondary air monitor circuit
Typical repair costs for P1414 range from $120 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. Will result in emissions test failure and may cause slightly elevated cold-start emissions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1414 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control - Secondary Air Injection
Difficulty
Type
Manufacturer
Recommended Tools
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