Diagnóstico / Códigos de avería
Cylinder Misfire / Combustion Fault
P0315 is a cylinder misfire / combustion fault on the Mercedes Sprinter VS30 (OM642 3.0L V6 diesel).
Qué significa este código
P0315 on the Mercedes Sprinter VS30 falls under the cylinder misfire / combustion fault group for the OM642 V6 diesel. The ECU sets this code when it detects an out-of-range condition in this system. Use the symptoms, common causes, and diagnostic steps below as a starting point, and always read the live data and freeze-frame for this specific code before replacing parts. If you're searching for the P0315 Mercedes Sprinter fix or P0315 VS30 / OM642 information, start with a full scan to capture any related codes stored at the same time.
Síntomas
- Rough idle or shaking, especially when cold
- Hesitation, stumbling, or power loss
- Check engine light (may flash under heavy misfire)
- Hard starting
- Increased smoke or fuel smell
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P0315 is a cylinder misfire / combustion fault on the Mercedes Sprinter VS30 (OM642 3.0L V6 diesel).
Causas posibles
- Worn, clogged, or leaking fuel injector (cylinder-specific)
- Low fuel rail pressure / delivery fault
- Faulty glow plug (cold-start misfire)
- Low or uneven cylinder compression
- Air ingress in the fuel system
Pasos de diagnóstico
- Scan and record all codes, noting which cylinder(s) are flagged.
- Read live misfire counters per cylinder.
- Perform an injector return (back-leakage) test on the affected cylinder.
- Verify rail pressure tracks the commanded value.
- Test glow plugs for cold-start misfires.
- If fuel and glow systems are good, perform a compression/leak-down test on the affected cylinder.
Reparaciones recomendadas
- Replace a worn, clogged, or leaking injector on the affected cylinder.
- Restore fuel rail pressure by fixing the supply or pump fault.
- Replace a failed glow plug causing cold-start misfire.
- Purge air ingress from the fuel system and reseal connections.
- Address low/uneven compression with mechanical repair if confirmed.