Malfunction and Remedies
Park heating (optional)
433 / 476
Error code
number/num-
ber of flash
pulses
error info Possible causes Remedy
Overheating protection sensor
fault
Check function of overheating pro-
tection sensor, replace if necessary
Wiring Check wiring for damage, gaps and
short-circuit
15 Glow plug refer-
ence resistance not
reached
Glow plug fault Check function of glow plug, replace
if necessary
Check wiring for damage, gaps and
short-circuit
Exhaust gas temperature sen-
sor fault
Check function of exhaust gas tem-
perature sensor, replace sensor if
necessary
16 Exhaust tempera-
ture too high
Heater clogged Visual inspection with cleaning or
replace burner unit, burner head
and interior of heat exchanger
Wiring Check wiring for damage, gaps and
short-circuit
17 Exhaust gas tem-
perature sensor
fault
Exhaust gas temperature sen-
sor fault
Check function of exhaust gas tem-
perature sensor, replace sensor if
necessary
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