Steve Rothwell answering your ENGINE MANAGEMENT queries
RENAULT MODUS
Q My problem concerns a 2007 Renault Modus 1.4 petrol with 63,000. The Renault runs great, except for one small problem, on start-up it idles to about 1200rpm – and revs correctly – but after only a few seconds drops to 700rpm then stalls and pops.
After a few minutes it then revs normally. There are no lights on dashboard.
I have tried a new air temp sensor, and intake manifold pressure sensor, to no avail.
Any help greatly appreciated.
IN ASSOCIATION WITH
A There are a couple of common issues which Autodata has alerted me to on your vehicle. The first is the possibility of ignition coil problems and although I would normally expect this to give a wider range of problems than you have, it would be worth checking them to be sure. The faulty coils were up to production number 330-03 and the production number can be found below the electrical connector on the side of the coil.
The second common issue which may well have a bearing on your problem is the possibility of a faulty crankshaft sensor. This does give the symptoms you have and would be worth replacing. It is quite possible for the crankshaft sensor to begin to fail in this way, but not cause any engine management codes to be flagged at this stage. Its continued decline could though cause further issues if this is the problem.
Finally, another cause of the problem may be in the throttle body and may be a faulty position sensor, and if replacing the crankshaft sensor gives no improvement, then cleaning the throttle body would be the next step.
FORD GALAXY
Q I call upon your technical expertise to help me with three issues on my 2017 Ford Galaxy 2.0 TDCi Titanium (180bhp) with Powershift (auto) transmission and 57,300 miles. It has unfortunately developed three seemingly incurable problems. Dealers and local ‘experts’ have scanned the car’s memory to retrieve the following codes but can offer no practical or affordable solutions.
1) P06DD-00 – engine oil pressure control circuit performance stuck off. This occasionally puts the car in limp-mode, usually when you expect it the least, like when accelerating hard to overtake or join a motorway.
2) P0620-13 – Generator control circuit - circuit open. This happens all the time on longer journeys, continually causing a RED alarm ‘Charging system - Service Now’ and illuminates the RED BATTERY warning. This is worrying as it chimes every few minutes even though the battery is in good condition and the system is charging normally.
3) Transmission P0826-12 – up and down switch input circuit - circuit short to battery. This issue has been ongoing since the first transmission service at 36,000 miles. Up until t
