Error Codes P042E & P0405
FORD C-Max II (DXA/CB7, DXA/CEU)
8 
331 
21.10.23 Back to topics
Occasional total battery drain
FORD FOCUS III
-
@user_2154880 Jan 15, 2024Member2013 Ford Focus 1.0 Mk3 which
I’ve owned from new. Never had any
previous faults. Go to start car one
morning, battery totally dead (4.5 volts).
I’m certain that nothing was left switched on, battery terminals clean
and tight etc. Jump started car, measuring
14.5 volts, no warning lights. Conclude
battery faulty so bought new one. About
2 months later same thing happened, one morning battery completely dead. This time, once car was jump started and
taken for ten mile run, I plugged in OBD tester (cheap EBay one) which showed “no error code detected”. Disconnected + terminal and placed meter
between terminal clamp and battery post, measures 1.25 milliamps with nothing
switched on.
Reply 15.01.24 
16.01.24 - @Roire1981 Jan 16, 2024MemberHi, something is drawing power and draining the battery, you need to get it serviced so they can find out what it is that won’t switch off when the car is just parked and fix itReply
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