Blimey ...

I had the fault codes checked on my car this afternoon, as it's been playing up for over a week now. There were plenty to look at ...

18011 P1603 Internal Control Module Malfunction

17978 P1570 Contr.Module Locked

17633 P1225 Cyl.1-Fuel Inj.Circ. Short to Ground

17635 P1227 Cyl.3-Fuel Inj.Circ. Short to Ground

17636 P1228 Cyl.4-Fuel Inj.Circ. Short to Ground

17634 P1226 Cyl.2-Fuel Inj.Circ. Short to Ground

17833 P1425 Tank Vent.Valve Short to Ground

17955 P1547 Boost Pressure Contr.Valve Short to Ground

17525 P1117 O2 Sensor Heater Circ.,Bank1-Sensor2 Short to Ground

17843 P1435 Sec.Air Inj.Sys.Pump Relay Circ. Short to ground

17938 P1530 Camshaft Control Circuit Short to ground

17829 P1421 Sec.Air Inj.Valve Circ Short to Ground

17697 P1289 Turbocharger bypass valve short to ground

16804 P0420 Catalyst System,Bank1 Efficiency Below Threshold

The chap cleared them all, and told me to take it for a run up the road, bring it back, and he'd see which had returned, so we could diagnose the overboosting problem and rough running by seeing which errors were current.

The car was miraculously returned to it's old self! When I returned to the workshop, no faults had returned (apart from the catalyst, but thats cos I haven't got one).

What I'm wondering is, are any of the above, now cleared, fault codes serious? And could they have been related to my flat battery issues about three weeks ago?

If so, why would the car wait a week or so before it started to behave oddly? I couldn't use any more than about half throttle, or the boost gauge shot off the end of the scale (20 psi +) and the car sounded very sick. Back off, even slightly, and the boost dropped and the engine appeared to return to normal.

Has anyone had a similar problem? I'm just a bit concerned that it might return. Everything seems OK again now though, touch wood.

I wish I'd spent the 30 quid last week now, before I struggled around France for 1800 miles with a semi-crippled car!

Have you washed under the bonnet a all or got a plug wet??

nope, the car hasn't even been driven in any particularly serious weather recently.

If the boosting/running problems had appeared immediately after the flat battery incident, I could understand everything, and I would assume the fault codes related to my repeated attempts to start the car with a flat battery, jump starting it etc.

The 'overboosting' just suddenly started one afternoon while I was out in the car, nearly a fortnight after the battery was replaced.

Very odd. Still, if it stays fixed, I'll be happy to put it down to 'gremlins'.

The chap that cleared the codes suggested that I take it back in a couple of weeks - or sooner if it plays up again - and he'll check that none of the faults have re-appeared.

A short to ground fault indicates something has been disconnected with the ignition on, a fuse has blown or a earth is faulty.

A short to ground fault indicates something has been disconnected with the ignition on, a fuse has blown or a earth is faulty.

Cheers Lummox ... at least I know what to look out for if it happens again.