hi.after i had a fault code saying the lh side tgv had low input, i took the car to the garage and had a second hand set put in.there is now a code saying the rh side is stuck closed. its strange though as the car is fine from startup, and can go up to 50 miles without a problem, then all of a sudden goes into limp mode for no apparent reason.

so my question is this- if its fine from a cold start, the valves must be opening?

and once the car is running at normal temperature the valves shouldnt close again,till the car is switched off?

so in your opinions do you think ive put in another dodgy set of valves, or could it be the sensor playing up once warm?

any help advice very much appreciated,thanks alot, steve