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P2194 is a diagnostic trouble code (DTC) for "System Too Rich at Higher Load Bank 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
System too rich at higher load bank 2
This trouble code indicates that the bank 2 side of the engine is receiving a higher level of fuel than was specified by the vehicle’s manufacturer at higher engine speeds/loads.
Some of the potential causes of this trouble code may include:
The mass air flow sensor could be faulty
The intake air duct could be damaged causing a vacuum leak. A vacuum leak of any kind near bank 2 may also be a contributing cause of this trouble code
A damaged catalytic converter may be present
Oxygen sensors in the bank 2 circuit may not be functioning properly
Wiring or connectors that are associated with any of the above sensors and also be the cause of the issue if damaged
The fuel pressure may be out of specification
The powertrain control module may be malfunctioning
Some symptoms of this trouble code that the driver may experience would include:
A mechanic may diagnose this trouble code by starting with the mass air flow sensor to check that it and its circuitry are in good working order. Next, the mechanic would check the intake air duct parts for possible vacuum leaks as well as any other hoses or tubing near the intake. Then the mechanic would get under the vehicle to check the oxygen sensors and the catalytic converters for proper function.
The mechanic would also likely run a fuel pressure test and a vacuum test on the engine to make sure the readings were compliant with the manufacturer’s specifications. If the cause of this issue is not found during all of these tests, the powertrain control module would then be tested. After all tests are performed, the mechanic would then relay all information over to the customer to make an informed repair decision.
Oxygen sensors can often be replaced instead of the mass air flow sensors when diagnosing this trouble code. It is important to note that sensors and modules all work in harmony to get one specific task accomplished. If you think a sensor may be faulty, consider any other sensors that may be associated with it or have an affect on the sensor you are inspecting.
This trouble code would be somewhere in the middle of the seriousness scale. This code will not cause any immediate damage and it is possible that no symptoms will even exist. However, this code can cause major damage if it is stored for long periods of time or if drivability symptoms are associated with it. It is a good idea to have this trouble code diagnosed and repaired as soon as possible.
Repairs that can resolve the issues caused by this trouble code would include:
The unfortunate thing about this trouble code is that the repair price can vary greatly depending on what the root cause is. With this considered, it is important to make sure that the issue is diagnosed by a professional to avoid replacing parts unnecessarily and wasting time.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230