What if check engine light keeps on flashing after changing spark plugs?

Answer 1

First of all you would be best to invest in a handheld system analiser check device which can be used on most modern vehicles, basic models are only around £30 - £35 now, and plugging this into your access socket, normally situated halfway between the drivers door and centre console, will give you an error code that you can look up on the code manual that comes with the device. This normally tells you exactly where the problem lies without checking everything one by one. It will pay for itself as well, as garages charge anywhere from £50 to £100 + for just one reading. Flashing warning light often means a misfire so check continuity of each ht lead, check plugs are seated well and that (i'm sure you have) set the plug gap correctly. Also worth checking plugs for continuity as even thought they are new there might be a faulty one. Bad plug gaps can sometimes "upset" the fuel mix and set off the rear lambda sensor. Also worth cleaning ht lead connections as mine suffered from moisture problems but cleaning up the contact points seemed to help. Good luck First of all you would be best to invest in a handheld system analiser check device which can be used on most modern vehicles, basic models are only around £30 - £35 now, and plugging this into your access socket, normally situated halfway between the drivers door and centre console, will give you an error code that you can look up on the code manual that comes with the device. This normally tells you exactly where the problem lies without checking everything one by one. It will pay for itself as well, as garages charge anywhere from £50 to £100 + for just one reading. Flashing warning light often means a misfire so check continuity of each ht lead, check plugs are seated well and that (i'm sure you have) set the plug gap correctly. Also worth checking plugs for continuity as even thought they are new there might be a faulty one. Bad plug gaps can sometimes "upset" the fuel mix and set off the rear lambda sensor. Also worth cleaning ht lead connections as mine suffered from moisture problems but cleaning up the contact points seemed to help. Good luck