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P2199 is a diagnostic trouble code (DTC) for "Intake Air Temperature Sensor 1 / 2 Correlation". 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.
P2199 is a general OBD-II diagnostic trouble code indicating a malfunction with the intake air temperature sensor 1 / 2 correlation. This code may be seen with other intake air sensor codes.
The P2199 code is seen when a fault has been detected between the intake air temperature sensor 1 and 2 and their readings. P2199 is set when the voltage readings from sensor 1 and 2 are repeatedly not agreeing with each other or are out-of-range. The engine control module (ECM) monitors the intake air temperature sensor reading closely, and when this fault is detected, the ECM causes the Check Engine Light to be displayed on the dashboard. In addition to this code on the dashboard, a failsafe mode is set. The failsafe mode will remain until normal sensor readings are detected or the fault is repaired.
The most likely causes for the P2199 code:
Symptoms can vary greatly and can include:
Qualified technicians will follow these simple steps to diagnose the P2199 code:
Hooks up a scan tool to the DLC port and checks for any codes stored in the ECM
Notes any codes that are found, including history and pending codes, in addition to important freeze frame data that is associated with each
Clears all the codes from the ECM
Takes the vehicle on a test drive attempting to duplicate the conditions from the freeze frame data
Performs a visual inspection of all visible and obvious components for the IAT sensors, including making sure the IAT sensor is plugged in all the way
The scan tool will be used to check the datastream for the IAT sensors 1 and 2 and compared the values listed
The outside air temperature will be taken
IAT readings will be compared to specifications
The IAT sensor that has out-of-range readings will be checked for by a multimeter for the proper supply voltage and output signal
If all the previous steps fail to identify the fault, then a test of the ECM will be performed
IAT sensor failure is relatively rare. More commonly, the sensor wiring has damage or a sensor is left unplugged from other unrelated repairs. Following all diagnostic steps will make it easy to determine the cause of the P2199 code, and will help you avoid replacing good parts.
In most cases, the P2199 code is fairly minor. The vehicle may not run the best when it warms up, but normal operation should be mostly normal. With any Check Engine Light, it is best to repair them as quickly as possible to avoid any further damage.
The repairs that can fix the P2199 code are:
A few specialized tools are needed for diagnosing the P2199 code. The first is a thermometer of some sort. This is used to compare the intake air temperature sensor readings to the actual outside air temperature. When this is done, it will give a baseline for what the sensors should be reading.
The other special tool is a professional grade scan tool. These are used to access the live engine data as well as control other engine control test functions. This type of scan tool does much more than just check the code and clear them, and are incredibly useful when performing this type of diagnosis.
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.