Question about Cars & Trucks
2007 Hyundai Vera Cruz codes p2187 and p2189. How to resolve?
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Posted on Jan 02, 2017
SOURCE: code P2187
P2187 System Too Lean at Idle (Bank 1)
Check the MAF. this could be the reason for the O2 reading lean. if the MAF is ok and, the sensor is not damaged, replace the Os sensors.
Posted on Jul 17, 2009
"Fuel system too lean at idle". It's an air/fuel ratio that is not correct, possibly a vacuum leak somewhere. Or a leaky exhaust pipe. Could be related to intake manifold gasket. Somewhere, air is getting into the engine.
I suggest taking it back to the dealer under warranty. I think Hyundai is 10yr./100k for the original owner. 5yr./50k if not. Ask first if covered, and ask why not id not covered.
Posted on Apr 10, 2010
SOURCE: Got emission codes of P2187
The code p2189 and p2187 signifies that air/fuel mixture too lean on both cylinder banks which in turn generates excessive emissions = failed inspection.
What can cause a lean mixture:
- Incorrect main charge signal
- Intake air system leaking
- Fuel pressure too low
- Volume supply of fuel pump too low
- Mechanical fault in injectors
- PCV valve leaks
- Leaks in exhaust system
- EVAP canister purge valve mechanically faulty (hangs open)
All these must be checked to correct the problem
Posted on Nov 23, 2010
P2187 = "system too lean at idle, bank 1"
The problem is in the bank of cylinders that includes cylinder 1. Running too lean at idle can often be caused by an air leak between the mass air flow sensor and the throttle body, a leaky intake manifold gasket, or some other vacuum leak. "False air" is downstream of the MAF sensor so it is not measured. The computer only attempts to add the correct amount of fuel to air that it knows about. It will attempt to compensate for lean mixtures but at a certain point, it will turn on the check engine light.
The miss that you had on cylinder one was caused by two things; the false air leaning out the mixture and a worn plug. You replaced the plug and now that new spark plug is able to fire the lean mixture. But the false air remains to be corrected. Eventually, you'll have misfiring again.
Posted on Feb 25, 2011
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