BMW Repair Questions? Ask a Mechanic for Answers ASAP
Dear customer, when the vehicle displays a warning light accompanied by one of these errors, the control unit has detected a fault in the DPF pressure sensor circuit (which has been designated as A). In some cases, the pressure sensor is mounted in the engine compartment, somewhat remote from the DPF. It monitors the back pressure of the exhaust gases before it enters the DPF. When the control unit detects a backpressure that does not match the manufacturer's specifications, an error is generated and the corresponding warning lamp illuminates.
Possible causes of these errors are:
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