Bieg jałowy — obroty poniżej normy
P1510
ŚredniIdle Signal Circuit Malfunction / Idle Speed Control Valve Blocked.
Fault code P1510 indicates a problem with the idle signal circuit or a blocked idle speed control valve. This usually manifests as the check engine light coming on and unstable idling. There can be several causes – from a dirty valve to electrical faults – so it is worth consulting a mechanic.
Symptoms
Check Engine light on, unstable engine idle, jerking, possible engine stalling, increased fuel consumption.
Possible causes
Blocked or faulty idle speed control valve (ISCV). Damaged wiring or connectors in the idle signal circuit. Faulty accelerator pedal position sensor (in some models). Problems with the engine control module (ECU/PCM).
Affected systems
Related codes
Czujnik pozycji pedału gazu D/E — korelacja poza zakresem (Mercedes)
Bieg jałowy — obroty powyżej normy
System regulacji biegu jałowego (IAC) — usterka
Sources and further reading
Does code P1510 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
