Looking for some help with my Astra 2001 1.8. Engine management light and traction control light are staying on and car is missing. Have changed the mass airflow sensor, coil pack and lamby sensors Fault code it is giving is P0202 which is injectors but have had then checked and all is ok. The traction control light does go out and car the runs ok for a while then comes back on then starts missing again Has anyone got any ideas.