i have the same fault but my 2lt hpi is now in limp mode and will not rev above 2000 this limits the car to 45mph. The fault you have will be in the exhaust line with one of the 4 senors that citreon have kindly put in there.
Cure is to get a ecu scan by citreon only, other ecu readers just say yes it has a fault but not sure what it is. Citreon charge about £95 this is an hours labour plus the scan but you will know what the issue is.
Then sensors are not cheap you might need some smelling salts when you get a price from citreon for them. I know the two in the cat are about £240 from citreon and can only be got from them the two up by engine are £89 and can be got at GSF & the like of.
Posted on Thursday 7th of June 2012Don't understand this? Ask a question