Hi,
My '06 C4 VTR+ coupe 1.6 HDi (non dpf) has just ticked over 180k miles and has developed what I think might be a knackered EGR valve.
The car still drives very nicely and is returning a very good mpg (56.4mpg on daily commute of motorways, A & B roads) but yesterday it started hesitating momentarily while driving at constant speed (45-50 mph) and under no particular load (it's done this before, but only once in a while and nothing continued), with the hesitations getting more frequent until the ESP warning light came on. At this point I'd reached my destination so I turned it all off and left it for a few hours. After that it started and drove with no issue (ESP warning disappeared). On my return journey, the hesitations returned after ~15 miles/30 minutes and got progressively worse until all the lights on the dash came on and the engine stopped. I left it 5 mins and it restarted with no problems and I carried on with a few little coughs and 1 big cough for the rest of my journey (another 15 miles).
Today I've cleared all the fault codes, gone for a drive, had the ESP warning come back on, filled it with a tank of V-Power Nitro+ (the ESP light went off after I restarted) and put a can of Wynns EGR valve cleaner through the engine. I've taken it for a 10 mile drive and there was no issues but the following fault codes have reappeared: P0401, P0490 (both EGR) and P1459 (possibly EGR?).
So, does this sound like a knackered EGR, and more to the point, on a car with 180K on the clock, is it worth fixing/replacing? A quick search round the forums suggests they aren't easy to replace because of the fun location on the back of the cylinder head.
Thoughts anyone??
Cheers,
Chris
My '06 C4 VTR+ coupe 1.6 HDi (non dpf) has just ticked over 180k miles and has developed what I think might be a knackered EGR valve.
The car still drives very nicely and is returning a very good mpg (56.4mpg on daily commute of motorways, A & B roads) but yesterday it started hesitating momentarily while driving at constant speed (45-50 mph) and under no particular load (it's done this before, but only once in a while and nothing continued), with the hesitations getting more frequent until the ESP warning light came on. At this point I'd reached my destination so I turned it all off and left it for a few hours. After that it started and drove with no issue (ESP warning disappeared). On my return journey, the hesitations returned after ~15 miles/30 minutes and got progressively worse until all the lights on the dash came on and the engine stopped. I left it 5 mins and it restarted with no problems and I carried on with a few little coughs and 1 big cough for the rest of my journey (another 15 miles).
Today I've cleared all the fault codes, gone for a drive, had the ESP warning come back on, filled it with a tank of V-Power Nitro+ (the ESP light went off after I restarted) and put a can of Wynns EGR valve cleaner through the engine. I've taken it for a 10 mile drive and there was no issues but the following fault codes have reappeared: P0401, P0490 (both EGR) and P1459 (possibly EGR?).
So, does this sound like a knackered EGR, and more to the point, on a car with 180K on the clock, is it worth fixing/replacing? A quick search round the forums suggests they aren't easy to replace because of the fun location on the back of the cylinder head.
Thoughts anyone??
Cheers,
Chris
