1997 Dodge Caravan "service engine soon"

Check the compression and injector for no.2 cylinder and also the TCC solenoid wire harness-

You should definitly attend to these.

Were the codes checked before the tune up?

What tune up parts were replaced?

hi again,
re-tune up, code PO302 appr'd on OBD & spark plugs, cap & rotor, wires & PCV valve were replaced. But after driving 2 miles, the light went ON again! I've tried to reset by detaching the battery terminal for 30 mins then putting it back. Click ON & OFF the ignition for 4x then start the engine, it works! But after driving around the block, it came back again. Went to see the mechanic who did the tune-up & read his scanner "PO302" again & "PO743" appeared! He told me he will look onto the problem but it will take about 4 hrs to diagnose thoroughly, it means a lot of money. Right now, the van still runs good! Except for the light sensor. Will it be good if I still use the van to work? I still trying to save more. Thanks for your time to answer me! Hope to hear from you!

Ask your guy to diagnose one at a time since money is tight.

Start with the misfire. Like Raz says, a compression test on the cylinder would be a good start. The injectors can be swapped with another cylnder and/or ohmed out.

I don't think driving this with this code is a good idea, regardless how it runs. It not only will affect gas mileage, but can start to cause more damage

wow! You guys are awesome! Thanks a lot! I'll try to bring my van today & get it done. Atleast, now I can share something to my mechanic. I will sure recommend this forum to my friends & relatives. More power to you guys! I'll get back to you after my van is fixed!

Glad to be of service. I'm sure your shop is quite capable of keeping you on track!