Alfa Romeo Brera 2.4 JTDM 939 A9.000
ND57HKZ ZAR93900005021059
Car recovered in non start. Customer informs me that the car has been going into limp mode, engine management light comes on, reads and clears his own fault code, particulate filter fault. I scanned for fault codes, P010F Air Flow Meter Incongruence and P1206 Particulate Filter.
Car cranked and tried to fire. Given the info from the customer, attached the scope to the DPF sensor. Goes straight to 5v on cranking, no start, suspect blocked particulate filter, disconnect exhaust system in front of filter. Engine starts and runs.
Replaced DPF, carried out resets using scan tool. Vehicle now starts and runs. While road testing sets fault code P1206 particulate filter. Similar fault to what the customer experienced before the non start. The filter was obviously blocking up then and is now new. Rechecked DPF sensor voltage, ignition on 384 mv, idling 557 mv, WOT 3.423 v. Vehicle seems to have a lack of power until about 1900 RPM, alos cuts out straight after 1st start from cold. Replaced the air flow meter, removed and cleaned EGR valve, vehicle now runs a little better but fault still present. 3 v WOT seems a little high to me. Faulty sensor? Poor quality after market DPF? Thanks for reading, any advise appreciated, kind regards, Andy