Hi, hoping someone can help...
I've recently (within last 2 months) noticed that my 56 plate 2007 Auris 2.0 D4D (1AD-FTV) has become a little louder at idle - the engine seems to 'tap' over a little louder than usual. I thought that this was just due to the colder winter conditions and the car getting a bit older (56,000miles) - plus the fact that I've never properly serviced the car since 30kmiles.
I've also noticed that the car (most noticeably upon starting but also during general driving) is emitting blackish smoke rather than the normal exhaust fumes. Additionally, the car was struggling to start more than usual.
Otherwise, there's no noticeable difference in driving - perhaps a slight difference in the idling (it sits happily at 900rpm but not quite as 'steady' as usual)
Within the last month the blackish smoke was getting to me so I:
1. Removed/cleaned the EGR valve - caked in carbon but symptoms persist
2. Changed engine oil, filter, air filter, fuel filter - symptoms persist
3. Replaced battery, spark plugs - symptoms persist (though starting improved but not perfect)
4. Added Redex/Wyne's diesel cleaner to fuel - symptoms persist
Today, the engine management light appeared on the dash with 'CHECK ENGINE' displayed. Rather than ignore I called the RAC (free VAG check!) and they confirmed (as attached pic shows) that the engine is reporting " P1238 Injection Valve " error. RAC guy also thought that the tapping on idle and revving was excessively loud and he suggested that the 2nd injector was blocked or not spraying properly. He recommended googling further and perhaps trying Forte Advanced Formula Diesel Treatment as a last shot before taking to dealer or diesel specialist.
Questions:
1. Has anyone else experienced this code and what was the outcome?
2. Is there anything else worth trying before taking to garage? - is the Forte diesel treatment likely to unblock the injector?
3. Is it possible to 'clean' or 'unblock' an injector? I have a diesel injector specialist garage not too far away (Argyle Diesel Electrics in East Kilbride) so i'm likely to take it there but would like to know in advance what is the likely course of action - and the typical cost of cleaning/unblocking/resetting a faulty injector.
4. How much is it (ballpark) to replace an injector if faulty?
5. Where are the injectors located and is it possible to DIY?
Any other comments, hints, tips or suggestions gratefully appreciated...
thank you.