P1420 — Secondary Air Injection Control Module Electrical Malfunction

What Does P1420 Mean?

P1420 is a manufacturer-specific diagnostic trouble code: Secondary Air Injection Control Module Electrical Malfunction. This code applies to VOLKSWAGEN, BUICK, CADILLAC, CHEVY, CHRYSLER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1420

⚠️ Check Engine Light (MIL) illuminated
⚠️ Secondary Air Injection Control Module Electrical not operating correctly
⚠️ Related system in reduced functionality mode
⚠️ Reduced engine performance

Common Causes

🔍 Secondary Air Injection Control Module Electrical has failed or is degraded
🔍 Wiring or connector issue in Secondary Air Injection Control Module Electrical circuit
🔍 Related mechanical component affecting Secondary Air Injection Control Module Electrical
🔍 Software update needed for ECM/PCM

Frequently Asked Questions

What does P1420 mean?

P1420 indicates: Secondary Air Injection Control Module Electrical Malfunction. The vehicle's computer has detected that the Secondary Air Injection Control Module Electrical is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1420?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1420 for extended periods may cause additional problems.

How much does it cost to fix P1420?

Repair costs for P1420 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Secondary Air Injection Control Module Electrical and related wiring
🔧 Replace faulty Secondary Air Injection Control Module Electrical

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1420: Secondary Air Injection Control Module Electrical Malfunction