I had this warning light come on recently so I bought a diagbox kit from easy diagnostics and have ran a global scan and looked at the DPF data. this is on a 2009 58 plate c5 tourer (x7? thats what works in diagbox anyway)
VIN: VF7**************[VIN obfuscated, can be read by forum staff]
the fault codes that are coming up are;
P1351 - preheating relay circuit; cause = local, status = permanent, fault characterisation = relay supplied and plugs never supplied
P2124 - inlet air heating motorised throttle unit; cause = local, status = intermittent, fault characterisation = open circuit
P1471 - EGR Motorised throttle unit; cause = local, status = intermittent, fault characterisation = open circuit or excessive temperature on an ECU pin
P0243 - turbo pressure electrovalve control; cause = local, status = intermittent, fault characterisation = open circuit or value too high
the Paritcle Emission Filter information is as follows; (temps may be weird as car was only running for a few minutes)
particle emission filter load = 60%
catalytic converter downstream temp = <100 degrees c
total weight of additive contained in the particle filter = 120g
volume of additive remaining in the reservoir = 987ml
exhaust differential pressure = 0 mbar
intake air temp at the airflow sensor = 22 degrees c
inlet air temperature at manifold = 22 degrees c
airflow volume = 22kg/hr
average distance between regens over the last 5 cycles = 282km
distance travelled since last regen = 180km
vehicle speed = 0 (obviously
)engine coolant temp = 58 degrees c
measured injected flow = 6.28mg/impulse
additive adding system fault = addition of additive not possible
60% load seems very high which is odd because I do a lot of reasonably long motorway journeys between 2500 and 3500 rpm so thought that would allow for good regens?
Any help on what could be the root cause? could any of those faults stop the car doing a regen properly or cause the warning light?
