Check engine light came on

If the light is off leave it alone. All North American vehicles us OBD2 codes, they are all available online by search for code and them number.
https://www.yourmechanic.com/article/p0404-obd-ii-trouble-code-exhaust-gas-recirculation-circuit-range-performance-by-jay-safford

https://www.obd-codes.com/p0404

https://repairpal.com/obd-ii-code-p0404

code p1512 refers to intake manifold runner control stuck closed
replace it or remove it and clean it

What make and model car ? P0172 OBD II Trouble Code could be running so rich that it fouled the sparks . Pull out the spark plugs and see if there are wet with fuel and black, means that they are fouled out. Have to be cleaned or replaced . I don't know the make of vehicle , so I can only give approximation what mite have caused this , a fuel pressure regulator with a ruptured diaphragm leaking fuel into the intake manifold, leaking fuel injectors P0172 System Too Rich Bank 1

with the engine cold spray the intake manifold near the gasket with the carb cleaner see if the idle changes if it does replace the gasket

P1518 Intake Manifold Runner Control Stuck Open (Bank 1)
Sorry no idea what this means ,but i suspect the valve on the fuel rail the one with the vacumn pipe to it ?'

YOU GOT IT. I'm sure the oil pressure went low when the car was on ramps causing a CE light. The louder noise poss wrong belt or exhaust leak!?

Maybe you forget to clear the old fault code that in computer control system. If your car supoort OBD-II protocols, the elm327 bluetooth scanner can do it.

P1518 intake manifold runner control.stuck open.do a search on ''you tube''key word P1518
you dont mention year,modle or engine.

code p1518= intake manifold runner control (IMRC) malfunction (stuck open)

the intake manifold has two runners per cylinder, feeding each of the cylinder heads
the IMRC assemblies are located between the intake manifold and two air passages for each cylinder.
one air passage is always open and the other passage switches from means of a valve plate.
below 3000 rpm, this valve plate is closed to improve low speed performance.
above 3000 rpm, this valve plate opens to improve high-speed exceleration.
the valve plates are opened and closed by the IMRC deactivation by the powertrain control module
(pcm) if your car or truck is not affected by the error code, the pcm may need to be reprogrammed
so that the error does not come up again. or you can connect an obd2 scanner and reset ever y time
it comes up. good luck!

Hello! A P1518 is a Intake Manifold Runner Stuck Open...It is a device that is held in place by three bolts and is located on the front of the intake manifold...There are two Actuator Rods...A 4 wire connector plugs into the top...Pin #1=Black (ground)...Pin #2=Dark Blue/Light Green...Pin #3=Red...Pin #4=Dark Blue/Yellow...

Check the connector for loose, frayed, contaminated, or open wires...However the Actuator is more than likely jammed with carbon...


Guru..............saailer


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