Making noises

I have the check engine light and its been on for months car is really making noises some one said its the water pump but my car does not over heat then a code came up as well they said egr valve is clog and when the a/c comes on the noise kinda of goes away. but it all has something to do with engine and a/c its makes a growling noise or some sort of loud noise

CEL on for months?

Post the actual code numbers on here and identify your vehicle (everything).

Some people refuse to go to the dentist while others refuse to see an auto mechanic. They each get what they pay for. The same is true for advice that costs nothing.

You’d better bring your car to the shop ASAP. It’s either that or check the daily bus schedule.

That CEL (check engine light) is just a kid in class waving her hand trying to get you attention because she has the answer. You need to have the codes read. Some places will read them for FREE. Try Autozone or Advanced Auto Parts. Get the exact code (like P0123) not just their translation into English and post it back here.

Regarding warning lights:

  1. if the coolant temp light comes on, shut off the engine ASAP

  2. if the oil warning light comes on, shut off the engine ASAP

  3. if a FLASHING MIL/CEL comes on, shut off the engine ASAP

    ASAP means driving to the berm of the highway right now and not waiting for the next exit.

But if the MIL/CEL is not flashing, then it’s not an urgent indicator. However months is long past due. It could be causing damage to other parts by now.

its a nissan maxima 97