Intermittent fault, driving along and randomly warning lights come on the dash and I lose acceleration, rev counter and speedometer needles drop to 0, engine still firing but no acceleration for a few seconds or more then it all comes back to normal, any ideas? Fault code p900. Mk2 2005 Ford Focus 1.6tdci 135k miles

 

Have seen where these symptoms were caused by poor ground connections. Never hurts to check and clean them especially when they look OK!

 

Have you researched the codes ?

God bless
Wyr