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Yorkshire GOC · 18th October 2019, 09:45

I had this fault as a comforting yellow MIL on my IPK for many years - resets and clears with T4/OBD but returned in a few miles -20 miles being the longest - 5/6 miles the shortest distance.

Swopped out the purge vale - no joy
Swopped out the hose to the charcoal cannister - no joy
Swopped out the charcoal cannister - no joy
Checked electrics to purge valve - no joy

Suggested other problems - a break in the vacuum system caused by a faulty fuel cap - swopped out fuel cap - no joy

A micro leak in the exhaust hose - again impairing the vacuum - never got round to checking this.

It was suggested it could have been an ECM fault - but i have remapped my car to 200bhp with a new KMAPS ECM with the programmed factory limiter software removed - no joy However the yellow light has gone out - but an OBD tool still shows the fault. For your MOT to avoid a fail i suggest prior to your test you use an OBD tool to clear the code - it should last long enough for you to pass the test.

18th October 2019, 09:45	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,069 Thanks: 1,842 Thanked 623 Times in 469 Posts	I had this fault as a comforting yellow MIL on my IPK for many years - resets and clears with T4/OBD but returned in a few miles -20 miles being the longest - 5/6 miles the shortest distance. Swopped out the purge vale - no joy Swopped out the hose to the charcoal cannister - no joy Swopped out the charcoal cannister - no joy Checked electrics to purge valve - no joy Suggested other problems - a break in the vacuum system caused by a faulty fuel cap - swopped out fuel cap - no joy A micro leak in the exhaust hose - again impairing the vacuum - never got round to checking this. It was suggested it could have been an ECM fault - but i have remapped my car to 200bhp with a new KMAPS ECM with the programmed factory limiter software removed - no joy However the yellow light has gone out - but an OBD tool still shows the fault. For your MOT to avoid a fail i suggest prior to your test you use an OBD tool to clear the code - it should last long enough for you to pass the test. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.