What voltage should a DPF pressure sensor be?
It should be around 12.6 volts. Consult the manufacturer’s service manual to identify the signal, ground, and 5-volt reference and back-probe the wires. Turn the ignition switch on without starting the engine.
What is a differential pressure sensor in a DPF filter?
A differential pressure sensor is an electronic sensor that measures back pressure before and after the DPF and determines the level of soot contained within the dpf. What happens if it the pressure differential sensor goes wrong?
What does the DPF fault code p246c mean?
P246C Excessively high pressures on the inlet side indicate a restriction on the DPF. P2463 is a generic codethat is defined as “diesel particulate filter restriction”. When fitting a new DPF it is recommended that a forced regeneration is carried out directly after resetting the ECU.
What happens if the differential pressure sensor stops working?
If the Differential Pressure Sensor stops working or becomes faulty it cannot send accurate information to the ECU about the level of soot accumulated within the DPF. Without this information the ECU cannot start the regeneration process to burn off the soot and empty the Diesel Particulate Filter causing it to become blocked.
Why did my DPF go into limp mode?
The car had covered 235,417km and it was found that the old DPF was blocked due to a faulty pressure sensor. The pressure sensor was exchanged, and pipes were checked and clear. The two fault codes for soot and ash were deleted, but after a short period of time they returned resulting in the engine going into limp mode.
What causes the DPF pressure sensor to set p2455?
Symptoms of a P2455 code may include: Excessive black smoke from the exhaust Higher than normal transmission temperatures Potential causes for this code to set are: Clogged DPF pressure sensor tubes/hoses Open or shorted circuit/s in the DPF pressure sensor A circuit Faulty DPF pressure sensor The diesel exhaust fluid reservoir may be empty
What is the OBD II fault code p2454?
OBD II fault code P2454 is a generic code that is defined as “Diesel Particulate Filter Pressure Sensor “A” Circuit Low”, and is set on diesel vehicles when the PCM (Powertrain Control Module) detects an abnormally low voltage in the control and/or signal circuits of the Diesel Particulate Filter Pressure Sensor labelled “A”.
P246C Excessively high pressures on the inlet side indicate a restriction on the DPF. P2463 is a generic codethat is defined as “diesel particulate filter restriction”. When fitting a new DPF it is recommended that a forced regeneration is carried out directly after resetting the ECU.
When to use the p2455 particulate filter code?
A code P2455 will be stored if the PCM detects an exhaust pressure condition that is higher than manufacturer’s specifications or an electrical input signal from DPF pressure sensor A which is higher than programmed limitations.