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hey guys.

my engine light came on, so i took it to the mechanic and he tested the ecu. he said it came up with faults regard the coil circuit. i just wanted to know what that meant so that i can fix my car straight away. my mechanic didnt tell me anything else part from that. not even the error code.

thanks

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error code 21 will most likely be coil packs, double check that with the mechanic to see if it was the coils, also coils take about 2 hours to change with the parts so you should be good to go in about 1 day. if you have a non turbo like me, you might want to get 1 2nd hand coil pack replaced instead of 6 new iridium ones as that would cost u 600+ instead of about 200 bucks.

i've just rang him and got no reply!!! i just wanted to know what other things would be affected in the coil curcuit for the engine to come on. and yes its a non turbo. if it is the coil packs i was thinking of getting the yellow jackets coil packs? (anyone know if they are good)

cheers

  • 5 weeks later...

could be o2 sensor crank angle sensor or spark plugs, most likely coil packs

Would a faulty o2 sensor cause the engine light to come on?

i took mine (RB25DET NEO) to a mechanic and got the same code result,

He got the same code reply and changed a coil pack he thought was faulty and all the spark plugs.

i still get the problem, the car runs noticeably rougher when the light comes on but usually i can turn the car off and on

again and the light stays off.

The light can go a week or more without coming on and usually tends to come on when i take it easy and drive economically.

Thanks in advance

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