help please : light on dash

[RDG 40]

Just driving tonight and a yellow light came on my dash for about 20 secs falshing on and off, got home to find out its the exhaust emissions have deterioated light, what does this mean? has my exhaust given up the ghost?

thanks in advance of any info given

[lee330sport]

Just driving tonight and a yellow light came on my dash for about 20 secs falshing on and off, got home to find out its the exhaust emissions have deterioated light, what does this mean? has my exhaust given up the ghost?

thanks in advance of any info givenNot sure but maybe its the Cat/s?

[benny boy]

i would say its the lambda sensor on front or rear

[k4mm_d]

i have the same problem i have put the laptop on the car and it says fuel trim B1, wateva that means but i am not getting the millege i used to get, not sure what the solution is tho.

[lee330sport]

i have the same problem i have put the laptop on the car and it says fuel trim B1, wateva that means but i am not getting the millege i used to get, not sure what the solution is tho.Fuel trim usually goes when an oxgen sensor is on the way out. The ECU changes the injector duty cycle to keep a nice A/F ratio. If the O2 sensor is broken the car will run rich, and use more fuel.

[Chaos]

Do you get a reading next to the Fuel Trim Bank1 figure Kamm? The figure can be positive or negative, with 0.00 being optimal. Like Lee says, if the figure increases then the ECU rigs the car to run rich, if it decreases then it runs lean. Sounds like yours is the former Kamm.

RDG, your problem can be caused by the car running lean aswell, it detects an incorrect value and flags the warning light. Could also be an oxygen sensor on the cylinders though (think 6 cyls run one for cyls 1-3 and one for 4-6 iirc). The dealers should be able to plug-in and tell you almost immediately what's up. Worth running it for a few tankfuls though and see if it clears up, it could just be a temporary thing.

Digs had this a bit with his 330 I think, he'll probably be able to help better than me.

[adood84]

sorry to be off topic , but how can you connect your laptop to your car ? could you download stuff the ECU?

[RDG 40]

thanks guys its not been on at all today and was a one off its only ever been on once before months ago, il get it checked out when the new brakes go on anyway, thanks guys. Lee you know far too much lol.