GETING 200 AND 302 CODE NEED HELP - 1999 Chevrolet Malibu

Fuel pump relay? Roll over switch tripped?

Describe the engine code for example 4A-FE, 1NZ-FE, and model year.

Please describe the model year and engine code. Thanks.

YOU MAY ALSO CHECK FOR A STICKING EGR VALVE AND A FAULTY FCIM MODULE OR FAULTY GLOW PLUG MODULE YOU EGR IS LOCATED ON TOP FRONT OF ENGINE TRY DISCCONECTING IT
HAVE YOU TRY GETING CODES WITH A CODE READER TRY GETING CODES IF YOU GET THEM LET ME KNOW AND ILL TELL YOU ON WHATTO DO TO SOLVE YOUR PROBLEM

That is a MFG Specific Code

It may be trans related,I don't
have that one

You will need a scan tool,not a
code reader, to look at the data.

A PO174 LEAN CODE FOR BANK 2 IS THE CYLINDER BANK ON THE LEFT SIDE OF THE ENGINE
(THE CYLINDERS FACING THE FRONT OF YOUR CAR)
A LEAN FUEL CONDITION COULD EXIST IF THE ENGINE IS GETING
TO MUCH AIR AND/OR NOT GETING ENOUGH FUEL
THIS CAN CAUSE MISFIRE, ROUGH IDLE, AND HESITATION WHEN ACCELERATING
THIS COULD BE
A VACUME LEAK, A DIRTY AIRFLOW SENSOR,
A EGR VALVE NOT CLOSING LEAKING EXHAUST INTO THE INTAKE MANIFOLD
IF ITS NOT GETING ENOUGH FUEL THE FUEL PUMP COULD BE BAD, THE AIR FILTER COULD BE DIRTY
OR IT COULD BE DIRTY INJECTORS
ID TRY FUEL INJECTOR CLEANER AND A NEW AIR FILTER FIRST
THEN TRY CLEANING YOUR EGR VALVE. COPY THIS LINK TO YOUR BROWSER FOR
STEP BY STEP INSTRUCTIONS TO DO THIS.
www.ehow.com/how_4809842_clean-ford-taurus-egr-valve.html

IF THIS DONT DO IT I WOULD TAKE IT TO A MECHANIC TO HAVE THE OTHER THINGS CHECKED
HOPE THIS HELPS.

A Heated Exhaust Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. is there any change in the drivabilty ?

you need a time machine

verify that injectors are getting signal to squirt fuel into the combustion chamber

Yes a timing belt could cause this. Ususally if the timing belt breaks/slips the engine will have a different sound while cranking it over to try to start it. Does it sound different? Also, if possable remove the cam position senser and look at the tone wheel that the senser reads and have someone crank the engine to see if the tone wheel turns, if not the timing belt is most likely the problem. I have seen a few tone wheels have problems but it is not common. What engine do you have?