P0402Średni
Układ EGR — nadmierny przepływ
Układ napędowy
Sprawdź szczegóły →P1405
ŚredniProblem with the exhaust gas recirculation (EGR) system – implausible signal or DPFE sensor fault.
Fault code P1405 indicates a problem with the exhaust gas recirculation (EGR) system. Depending on the vehicle make, it may mean a fault in the DPFE sensor hoses (common in Fords and Mazdas) or an engine control unit failure (typical in Opels). Due to different interpretations of this code by various manufacturers, professional diagnosis is recommended before starting repairs.
Symptoms
Check Engine light is on. Rough engine idle. Increased fuel consumption. Loss of engine power. Possible difficulty passing a technical inspection due to increased exhaust emissions.
Possible causes
Damaged or disconnected DPFE (differential exhaust pressure) sensor hoses – most common cause in Ford / Mazda vehicles. Faulty engine control module (ECM/PCM) – typical for Opel (Zafira A, Astra G, Corsa C, Meriva A, Vectra B/C models with Z18XE / Z18XEL engines). Contaminated or blocked EGR valve. Vacuum leak in the EGR system. Faulty DPFE sensor.
Affected systems
Silnik spalinowyukład recyrkulacji spalin (EGR)czujnik różnicowy ciśnienia spalin (DPFE)
Related codes
P0401Średni
Recyrkulacja spalin (EGR) — niewystarczający przepływ
Układ napędowy
Sprawdź szczegóły →Code P1405 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Sources and further reading
Does code P1405 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.