Idle fluctuation / engine management codes (e.g., P0171)
Often reportedThe 2.4 i-VTEC engine may experience low or unstable idle, check engine light, and codes such as P0171 (system too lean).
Engine Internal
When buying a used 2012 Honda Accord 2.4 i (8th generation / facelift), the most frequently mentioned issue is idle fluctuation / engine management codes (e.g., P0171). Noisy timing chain tensioner/VTC actuator and chain wear are also commonly reported.
Caution advised
Most reported issue: Idle fluctuation / engine management codes (e.g., P0171). Service history and a test drive matter.
Listed from most frequently reported, each with its source.
The 2.4 i-VTEC engine may experience low or unstable idle, check engine light, and codes such as P0171 (system too lean).
Engine Internal
Multiple user reports indicate a rattling noise on startup; in severe cases, the timing chain tensioner, guides, and/or VTC actuator need replacement. If neglected, the timing chain can stretch and risk engine damage.
Timing chain
The combination of the 2.4 i-VTEC engine with the 5-speed automatic transmission may feel unresponsive; slow acceleration, high-revving gears, and mismatch with the engine can occur.
Transmission
Honda Accord 2.4 i (2012): boot 406 L; fuel use 8,6 l/100 km (urban 12,2 l/100 km · extra-urban 6,5 l/100 km); 0–100 in 10 s.
Same trim, different year
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.