Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P2199: Intake Air Temperature Sensor 1-2 CorrelationDiagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage |
|---|---|---|---|---|
IAT Sensor 1 Signal | P0112 | P0113 | P0113 | P0113 |
IAT Sensor 1 Low Reference | -- | P0113 | P0113 | -- |
IAT Sensor 2 Signal | P0097 | P0098 | P0098 | P0098 |
IAT Sensor 2 Low Reference | -- | P0098 | P0098 | -- |
Circuit/System Description
The intake air temperature (IAT) sensor 1 is fitted between the air cleaner and turbocharger. It is internal to the mass air flow (MAF) sensor and measures the temperature of the air entering the engine. The IAT sensor 2 is installed to the intake manifold, and measures the temperature of the air entering the engine that mixed with exhaust gas recirculation (EGR) gas. The engine control module (ECM) monitors difference of temperature from both sensor inputs continuously. If the ECM detects that difference of temperature between both inputs are more than a calculated value, this DTC will set.
Conditions for Running the DTC
| • | DTCs P0097, P0098, P0112, P0113, P0117, P0118, P0126, P0237, P0238, P0409, P042E, P0642, P0643, P0652 and P0653 are not set. |
| AND |
| • | The following conditions are met for longer than 5 minutes: |
| - | The battery voltage is between 10-16 volts. |
| - | The ignition switch is ON. |
| - | The EGR valve position is 0 percent. |
| - | The engine run time is between 30-600 seconds. |
| - | The engine coolant is between -7 to +55°C (+19 to +131°F). |
| - | The boost pressure is less than 7.2 psi (50 kPa). |
Conditions for Setting the DTC
The ECM detects that the intake air temperature 2 is more than 50°C (122°F) over the intake air temperature 1.
Action Taken When the DTC Sets
DTC P2199 is a Type B DTC.
Conditions for Clearing the DTC
DTC P2199 is a Type B DTC.
Diagnostic Aids
| • | Before starting a cold engine, the intake air temperature 1 and 2 should be relatively close to each other. |
| • | If an intermittent condition is suspected, refer to Testing for Intermittent Conditions and Poor Connections. |
| • | Use the Temperature vs. Resistance Temperature Versus Resistance table to test the IAT sensor 1 or 2 at various temperature levels to evaluate the possibility of a skewed sensor. |
| • | A sticking or intermittently sticking EGR valve may set this DTC. |
| • | Skewed engine coolant temperature sensor or skewed boost pressure sensor may set this DTC. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify the integrity of the Glow plug relay control circuit by inspecting for the following conditions:
| • | Damaged components |
| • | Loose or improper installation |
Circuit/System Testing
Important: You must perform Circuit/System Verification before proceeding with Circuit/System Testing.
- Ignition OFF, disconnect the harness connectors at IAT sensor 1 or the IAT sensor 2.
- Ignition OFF, test for 4.8 volts between the applicable IAT sensor signal circuit and ground.
- Install a 3A fused jumper wire between the applicable signal circuit and the applicable low reference circuit for IAT sensor. Verify that the DMM is greater than 4.8 volts.
- If all circuits test normal, test or replace the affected sensor.
| ⇒ | If less than 4.8 volts, test the applicable signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
| ⇒ | If less than 4.8 volts, test the applicable low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
Component Testing
Test the IAT sensor 1 and 2 at various temperature levels to evaluate the possibility of a skewed sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
