P2194 code definition
System too rich at higher load bank 2
What the P2194 code means
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.
What are the causes of the P2194 code?
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
What are the symptoms of the P2194 code?
Some symptoms of this trouble code that the driver may experience would include:
- Decreased fuel economy
- Hesitation or stumble upon startup or acceleration
- The engine may misfire
- Black smoke may be emitted from the tailpipe
- Extended storage of this code can lead to catalytic converter failure
- It is possible to have no symptoms at all
How does a mechanic diagnose the P2194 code?
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.
Common mistakes when diagnosing the P2194 code
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.
How serious is the P2194 code?
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.
What repairs can fix the P2194 code?
Repairs that can resolve the issues caused by this trouble code would include:
- Replacing the mass air flow sensor
- Repairing a vacuum leak
- Resolving a fuel pressure issue
- Replacing an oxygen sensor
- Repairing or replacing wiring or connectors that are associated with the above sensors
- Replacing the powertrain control module
Additional comments regarding the P2194 code
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.
Need help with a P2194 code?
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