P2188 and P2189 is showing on the alarm code and I hear the hissss sound coming out from the left area of supercharger, wondering if this could be a vaccume leak?

 

you are correct, those codes represent bank one and bank two ‘too lean at idle’. Therefore, you have a vacuum leak and at least you can hear it.. you will need to locate the source and fix it. You can also look at the idle fuel trims, which are probably maxed out trying to compensate.

 

[QUOTE=brandhirsingh;2857945]P2188 and P2189 is showing on the alarm code and I hear the hissss sound coming out from the left area of supercharger, wondering if this could be a vaccume leak.

2189 is the System Too Lean at Idle Bank 2 which is the intake air duct that connects the throttle body and the 2 air filters. You may want to use some smoke like spray to determine where the hissing is coming which is great news that it’s making a sound. It may no be the super charger

 

The 2187 and 2189 is the 2 banks are leaking air and running lean. Check at Oriellys or Auto zone for a free code check. They will print out and let you know what part is tripping the sensor. I know that P2189 is the air intake that runs from the left and right air filter and center throttle body. Be careful with the sensor on the right of the tube. Just carefully push and pull from locking ring. loosen the clamps on the air filters first then the center center body clamp. Notice a screw and rubber grommet near the center tube and pull gently the centers and hold the center air intake from vibration and loosen the center intake. Make sure and clean the throttle body with sea foam and clean part. When replacing back make sure and loosen the center air intake tube clamp and pull back to allow the tube to push through the throttle body then tightening clamp first. Pull back to make sure it’s tight and not coming out. Take your time. Put the other tubes on the air filters and clamp the sensor back. Check to see if ltheir is a part associated with the P2188 code.

 

A free code check will not necessarily 'let you know what part is tripping the sensor'. A code won't point directly to a leak location or component.

The following explains actually what's happening:

What is going on is typically an air leak of unmetered air into the intake system which can arise from a multitude of sources ranging from the intake tubes between the air mass meter and the throttle body, to anywhere in the vacuum pie system to even a crack in a cam cover or leak in the PCV system and PCV diaphram. Lastly it could be a malfunctioning (contaminated) AirMass meter but that typically doesn't produce a code.

When the exhaust O2 sensors register a lean mixture during closed loop operation then there is an adjustment they can make and store (called fuel trims) to correct the imbalance and ensure mixture is perturbed around the stoichiometric ratio required for catalyst operation. However when the imbalance is too much (in the case of a leak) the fuel trim reaches it's maximum adjustment and it will set an error code (e.g. P2187 / 2189).

I hope this explanation is of value.

 

I didn’t mention the PCV because I didn’t want to throw to much into the issue. The only sensors are at the air filter duct. The gentleman below, although too technical is correct about the airflow. PCV does not have a sensor. Since I believe you said you could hear hissing you may want to check the PVC valve. Its location if facing the engine on the left side of the engine. Remove the cover and pull back the foam on the left side of the engine and you’ll see towards the back the PVC valve. There are several videos of how to remove and replace but the location for the 2017 was not pin pointed exactly. However before removing and replacing the part you can buy from Amazon for $9. it does take patience and at an obscure position when trying to replace the spring, orange bladder and 6 prong cap. I did it and took some thought and lots of patience.

 

PCV diaphragms from the dealer come with new black caps. It’s just not worth the effort to remove the old ones in a way that makes them reusable.