P1490 — Secondary Air Relief Solenoid Circuit Malfunction

What Does P1490 Mean?

P1490 is a manufacturer-specific diagnostic trouble code: Secondary Air Relief Solenoid Circuit Malfunction. This code applies to OTHER, DODGE, JEEP, PLYMOUTH, PONTIAC 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 P1490

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Secondary Air Relief Solenoid readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Secondary Air Relief Solenoid circuit (damaged, chafed, or corroded)
🔍 Faulty Secondary Air Relief Solenoid connector or terminal
🔍 Failed Secondary Air Relief Solenoid
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1490 mean?

P1490 indicates: Secondary Air Relief Solenoid Circuit Malfunction. The vehicle's computer has detected that the Secondary Air Relief Solenoid is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1490?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1490 for extended periods may cause additional problems.

How much does it cost to fix P1490?

Repair costs for P1490 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 and repair Secondary Air Relief Solenoid wiring and connectors
🔧 Replace faulty Secondary Air Relief Solenoid

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.

P1490: Secondary Air Relief Solenoid Circuit Malfunction