spent 800 dollars at the shop tofix check eng. light and its still on its flashing code 12 any help

 

Year, make and model of your Accord, please, and engine type/size?

What did the other shop do?

12 = EGR related? iirc. Someone will correct me if that's wrong.

 

sorry, its a 93 lx 2.2 auto, the shop replaced the radiator and hoses, oil change, t-stat and gasket, and did a induction service

 

EGR = exhaust gas recirculation. To improve your car's emissions, the engine opens a valve that redirects some exhaust into the intake manifold for recombustion.

If the EGR valve were stuck open the vehicle would idle bad, if at all, so more than likely, the EGR ports inside the manifold have become clogged with carbon, and the EGR code is setting due to the PCM detecting high backpressure. (It's good that the code sets, that usually means the PCM is doing its job!) The fix would be to remove the manifold and either use a pipe cleaner or a EGR tool (Snap-on and Matco, for two,make special drill attachments for cleaning EGR ports.)

The EGR function can be tested with a scan tool I think most generics will support this, including MT2500 and Genisys. If the EGR system is working correctly, the engine should idle down and stall when the EGR valve is commanded open by the PCM (via the scan tool.) If this doesn't occur, and the passages have been cleaned, your next step would be to look at the valve itself, or a bad transducer or sensor not letting the PCM command EGR operation. The shop where you had the repairs done should be able to do this test for you, although if your original concern was a check engine light, and they sold you $800 worth of preventive maintenance, I'd be looking for a different shop.

Hope this helps you on your quest to get rid of that light.

 

yes it did help, in fact you just gave me the reason the car idles at like 300 rpm