P1490 on Nissan
Secondary Air Relief / Injection Solenoid Circuit Malfunction
P1490 on Nissan vehicles indicates secondary air relief / injection solenoid circuit malfunction. Au7o has documented this code across 1 Nissan model — most commonly on Frontier. This is a manufacturer-specific code whose exact meaning varies by maker; on Ford it commonly indicates a fault in the secondary air relief solenoid circuit (part of the system that injects air into the exhaust to reduce cold-start emissions), while some applications use it for an EVAP or vacuum solenoid circuit. The computer detected that the solenoid circuit is open, shorted, or out of range. It is primarily an emissions-system fault and not an immediate drivability danger. Confirming the exact definition against the specific vehicle is recommended. Typical repair costs on Nissan range from $100 to $600, depending on the specific model and root cause.
Common Causes of P1490
- •Faulty secondary air (or vacuum) solenoid
- •Open or shorted wiring in the solenoid circuit
- •Corroded or loose electrical connector
- •Vacuum leak or collapsed vacuum hose
- •Failed secondary air pump or related relay
- •PCM driver circuit fault (less common)
P1490 on Nissan by Model
Nissan Frontier(1 issue)
- EVAP Canister and Vent Control Valve Failure Triggering Check Engine Light2000-2004
The evaporative emissions system on these trucks commonly develops faults from a sticking vent control valve, saturated charcoal canister, cracked hoses, or rust/dirt intrusion near the rear-mounted canister. Owners frequently report persistent check-engine lights and failed emissions inspections even though the truck otherwise drives normally. Nissan published EVAP-related service bulletins for leak and vent valve diagnosis on Frontier/Xterra-era trucks.
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View P1490 across all makes →Frequently Asked Questions
What does P1490 mean on Nissan?▼
P1490 stands for "Secondary Air Relief / Injection Solenoid Circuit Malfunction." This is a manufacturer-specific code whose exact meaning varies by maker; on Ford it commonly indicates a fault in the secondary air relief solenoid circuit (part of the system that injects air into the exhaust to reduce cold-start emissions), while some applications use it for an EVAP or vacuum solenoid circuit. The computer detected that the solenoid circuit is open, shorted, or out of range. It is primarily an emissions-system fault and not an immediate drivability danger. Confirming the exact definition against the specific vehicle is recommended. On Nissan specifically, this code is documented across 1 model.
What causes P1490 on Nissan vehicles?▼
Common causes on Nissan: Faulty secondary air (or vacuum) solenoid, Open or shorted wiring in the solenoid circuit, Corroded or loose electrical connector, Vacuum leak or collapsed vacuum hose, Failed secondary air pump or related relay. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1490 on a Nissan?▼
Repair costs on Nissan range from $100 to $600, depending on the specific model and root cause.
Which Nissan models have P1490 documented?▼
Au7o has documented P1490 on 1 Nissan model: Frontier.