P0430Średni
Wydajność katalizatora poniżej progu — bank 2
Układ napędowy
Sprawdź szczegóły →P3305
ŚredniCode P3305 indicates a detected fault in the emissions monitor circuit – a manufacturer-specific code. The fault concerns the emission control system and requires diagnosis with a specialized scanner.
OBD-II (EN): P3305 Emission Monitor Circuit Malfunction - Manufacturer Specific
Code P3305 signals a detected fault in the emissions monitor circuit – it is a manufacturer-specific code, meaning its meaning may vary depending on the vehicle make. The most common causes are electrical damage in the emission sensor circuit or problems with an emission control system component. Due to the specificity of the code and the need for access to manufacturer documentation, we recommend professional diagnosis at an authorized service center or a workshop equipped with appropriate tools.
Symptoms
• Check Engine light (MIL) on • Possible deterioration of engine performance • Potential increase in fuel consumption • Possible incorrect operation of the exhaust or emission system • In some cases, no visible external symptoms
Possible causes
• Damage to a component of the emission monitoring system (sensor, controller) • Open or short circuit in the emission circuit wiring harness • Damaged or corroded electrical connector • Engine control module (ECM/PCM) failure • Manufacturer-specific fault – may concern the EGR system, catalytic converter, or injection system
Affected systems
układ emisji spalinukład elektryczny/elektronicznysterownik silnika (ECM/PCM)układ EGRukład wydechowy
Related codes
P0420Średni
Wydajność katalizatora poniżej progu — bank 1
Układ napędowy
Sprawdź szczegóły →P0401Średni
Recyrkulacja spalin (EGR) — niewystarczający przepływ
Układ napędowy
Sprawdź szczegóły →Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code P3305 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.