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Diagnostic and advice needed for errors P12A2 & U1218

6.2K views 20 replies 5 participants last post by  mihai.leontescu  
PEUGEOT 5008 (T87) 2.0 HDiF DW10CTED4 (RHE) 2009 - Onwards
with start/stop

Not sure what using for diagnostics, but I don't have anything for DTC P12A2 from Haynes Pro.

DTC U1218 Communication with the power supply control unit
(1) E6 power control unit
Image


(2) E22 power control unit for ESP/ABS
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Does it start ?
Can you use a multimeter ?
 
Was the test of the injectors including leak off test or just electronic resistance test ?

DPF liquid (tester says it has 500ml but the tank sounds empty when knocking it)
Throw a light at 150ml off memory, so getting pretty close and normally DPF does need a clean around then / check for cracking internally, etc or a new one. YMMV.
 
The smoke may be CCV system rather than any particular issue. I would go looking at it, they typically do not throw DTC. If oil in the intake is high from CCV system, be pooling in the intercooler assuming you have one and that may need a clean as well.

Be called oil decanter system in Peuegot speak.
Find exploded views or OEM part numbers here Peugeot (ssg.asia)
 
The CCV operation, air intake (look for excessive amount of oil from the CCV) and intercooler (for pooling of oil), as mentioned.

The results of the test seem to be within specifications. Leak off was questionable results, need to think about that one, think they adjusted them from the data.