1.6 tdi glow plug flashing - limp mode occasionaly

[brennanbraund]

Hi everyone, I own a 1.6 tdi polo and recently the glow plug light has come on flashing, When i turn the engine off/on again the lights disappear then other times the engine light comes on with the glow plug light and sometimes goes into limp mode when driving. A colleague of mine has a fault checker and i got the codes -

P040300 - Exhaust gas recirculation circuit - passive/sporadic
P245500 - Diesel particulate filter differential pressure sensor circuit high - passive/sporadic

Can someone advise me the best route to get these sorted and prevent any further issues, Thanks!

[grpolo]

Im guessing your EGR or/and DPF filter is clogged

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[CarbonChaos]

EGR coolers are not a uncommon failure point which would lead to the second code .

[brennanbraund]

I have looked at a remap service which also offer an egr close if I was to get this and buy a new dpf sensor does anyone know if this would clear my issue? Thanks

[iichel]

If the EGR is physically broken (i.e. the valve is stuck or the cooler is leaking coolant internally) then a remap without further modifications will not solve the problem.
The DPF sensor is a cheap part and replacement is easy. It's not a guaranteed fix, but odds are not bad.

[brennanbraund]

If the EGR is physically broken (i.e. the valve is stuck or the cooler is leaking coolant internally) then a remap without further modifications will not solve the problem.
The DPF sensor is a cheap part and replacement is easy. It's not a guaranteed fix, but odds are not bad.

I gather would it be best to have a garage do this? As I’ve read you need vcds to re calibrate the new dpf sensor?

[iichel]

Yes, the sensor needs to be adapted. Simple job but needs a diagnostic tool.

[brennanbraund]

Could any diagnostic tool do it the typical plug in and check or does it need to be a more advanced one? Thanks