P1442 — Secondary Air Injection System Monitor Circuit High Voltage

What Does P1442 Mean?

P1442 is a manufacturer-specific diagnostic trouble code: Secondary Air Injection System Monitor Circuit High Voltage. This code applies to FORD, LINCOLN, MERCURY, BMW, BUICK 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 P1442

⚠️ Check Engine Light (MIL) illuminated
⚠️ Secondary Air Injection System Monitor reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in Secondary Air Injection System Monitor wiring harness
🔍 Corroded or water-damaged Secondary Air Injection System Monitor connector
🔍 Faulty Secondary Air Injection System Monitor outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P1442 mean?

P1442 indicates: Secondary Air Injection System Monitor Circuit High Voltage. The vehicle's computer has detected that the Secondary Air Injection System Monitor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1442?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1442 for extended periods may cause additional problems.

How much does it cost to fix P1442?

Repair costs for P1442 typically range from $20 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.

Reported Repair Costs for P1442

Based on 4 owner-reported repair costs from NHTSA complaints.

Low End

$230

Typical

$2300

High End

$3200

⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.

What To Do Next

Possible Fixes

🔧 Inspect and repair Secondary Air Injection System Monitor wiring for short to voltage
🔧 Clean or replace corroded Secondary Air Injection System Monitor connector
🔧 Replace faulty Secondary Air Injection System Monitor

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.

P1442: Secondary Air Injection System Monitor Circuit High Voltage