smartcarofamerica.com/threads/p0410-check-engine-error-code-secondary-air-injection-system-fault.12820/¶
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Forum thread: P0410 Check Engine Error Code, Secondary Air Injection System Fault | Smart Car of America Forum¶
smartcarofamerica.com/threads/p0410-check-engine-error-code-secondary-air-injection-system-fault.12820/ · p. 1 · Applies to: 451
Source: smartcarofamerica.com Topic: Secondary Air Injection System Valve Failure Models discussed: 451 Solution status: yes
Problem: P0410 Secondary Air Injection System Fault error code appearing on Smart Cars (primarily 451 model). The valve fails prematurely, often within the first few thousand miles of ownership.
Solution: Replace the Secondary Air Injection switchover valve (part number A0025401497 or Mercedes part 142147). The valve can be purchased directly from Smart dealer parts departments for approximately $37-42 including shipping and installed by the owner in less than 5 minutes (two vacuum hoses and one electrical connection). Alternatively, some dealers may replace it under warranty if the vehicle is within service area. Some reports indicate Mercedes-supplied replacement parts (part 142147) with slightly different voltage input characteristics may be more reliable than original Smart parts. A bad batch of original valves from the factory was suspected as the root cause. After replacement, users reported no repeat failures.
Key facts: - Failures occurring at 1,500-4,000 miles on early production vehicles - Part number A0025401497 (Smart) or 142147 (Mercedes alternative) - DIY replacement takes less than 5 minutes with basic connections - Not covered under warranty at remote locations; dealer service area required for warranty work - No repeat failures reported after replacement, suggesting bad factory batch rather than design flaw - Valve is unique to USA market; no reports of failures in other regions - Some dealers offer refunds for defective parts when original is returned - Check Engine Light can be reset for free at AutoZone with code reader