Hi All,

My 2010 Superb 170 Estate has done 67k miles. It does a mixture of local runs, with a 20 mile or so motorway run most weeks. It also tows our caravan quite quickly for 100/200 miles on motorways and dual carriageways about once a month.

Last November I inadvertently interrupted a DPF regen one evening. The following day we were towing the caravan up the A1, when after about 20 miles the glow plug light came on and the engine went into limp mode (dangerously slow when towing!), followed by the exhaust control light. After two stops to switch off and restart the engine, the fault cleared and I had no further problems on a 400mile trip.

Last week we were towing to Norfolk. After about 60 miles – and after climbing a dual carriageway incline quite quickly - the glow plug light came on and engine went into limp mode A stop-start cleared the fault. On this occasion I am certain a DPF regen was  fully completed a few days previously. Again there has been no recurrence in the rest of the trip or since.

I guess I better get it checked. Any ideas?

In particular, will a VCDS check by my (normally reliable) dealer be able to identify the cause of such an intermittent fault?

Thanks in advance for help and suggestions.

Cheers

Paul R T 

The DPF regen sounds like a red herring.

 

Any DPF issues will result in the DPF light illuminating.

 

The EML (Engine Management Light) and glowplug light are used to signal literally hundreds of potential faults, including exhaust gas and DPF related sensors.

 

As the lights have appeared and the car has dropped into limp-home mode there will be fault codes stored.

 

You really need to get the car scanned to see what the codes are.