DTC P0096 or P0111
| DTC P0096 or P0111 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptor |
DTC P0096
Intake Air Temperature (IAT) Sensor 2 Performance
DTC P0111
Intake Air Temperature (IAT) Sensor 1 Performance
| Diagnostic Fault Information |
IAT Sensor 1
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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IAT Sensor 1 Signal
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P0112
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P0113
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P0113
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P0111
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Low Reference
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-
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P0113
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P0113, P0114
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P0111
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IAT Sensor 2
| Circuit | Short to Ground | Open /High Resistance | Short to Voltage | Signal Performance |
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IAT Sensor 2 Signal
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P0097
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P0098
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P0098
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P0096
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Low Reference
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-
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P0098
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P0098
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P0096
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| Typical Scan Tool Data |
IAT Sensor 1
| Circuit | Short to Ground | Open | Short to Voltage |
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Operating Conditions:
Engine running
Parameter Normal Range: Varies with ambient temperature |
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IAT Sensor 1 Signal
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150°C (302°F)
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-40°C (-40°F)
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-40°C (-40°F)*
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Low Reference
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-
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-40°C (-40°F)
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-40°C (-40°F)*
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*Internal ECM or sensor damage may occur if the circuit is shorted to B+
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IAT Sensor 2
| Circuit | Short to Ground | Open | Short to Voltage |
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Operating Conditions:
Engine running
Parameter Normal Range: Varies with ambient temperature |
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IAT Sensor 2
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143°C (289°F)
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-40°C (-40°F)
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-40°C (-40°F)*
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Low Reference
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-
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-40°C (-40°F)
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-40°C (-40°F)*
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*Internal ECM or sensor damage may occur if the circuit is shorted to B+
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| Circuit/System Description |
IAT sensor 1 is an integral part of the mass air flow (MAF) sensor; it measures the temperature of the air entering the air induction system. IAT sensor 2 is an integrated part of the intake manifold pressure and air temperature sensor. It measures the temperature of the air after the turbocharger and the charge air cooler (CAC), and before it enters the engine intake manifold. The engine control module (ECM) supplies 5 V to the IAT sensor 1 and 2 signal circuits, and seperate grounds for their low reference circuits. At engine start up, the ECM monitors the engine coolant temperature (ECT) sensor, the IAT sensor 1, and the IAT sensor 2 signals for a voltage that is not within a calibrated range of each other.
The intake air temperature (IAT) sensor 1 and the IAT sensor 2 are variable resistors. When the sensor is cold, the sensor resistance is high. When the air temperature increases, the sensor resistance decreases. With high sensor resistance, the ECM detects a high voltage on the signal circuit. With lower sensor resistance, the ECM detects a lower voltage on the sensor signal circuit.
| Conditions for Running the DTCs |
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DTCs P0096, P0097, P0098, P0111, P0112, P0113, P0116, P0117, P0118, P0119, and P0128 are not set.
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The ignition has been OFF for at least 8 hours.
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DTCs P0096 and P0111 run once per key cycle at engine start, within the enabling conditions.
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| Conditions for Setting the DTCs |
P0096
At engine start, the ECM determines the absolute temperature difference between the IAT Sensor 1 signal and the IAT Sensor 2 signal is equal to or more than 20°C (36°F)AND
At engine start, the ECM determines the absolute temperature difference between the ECT signal and the IAT Sensor 1 signal is more than the absolute temperature difference between the ECT signal and the IAT Sensor 2 signal.
P0111
At engine start, the ECM determines the absolute temperature difference between the IAT Sensor 1 signal and the IAT Sensor 2 signal is equal to or more than 20°C (36°F)AND
At engine start, the ECM determines the absolute temperature difference between the ECT signal and the IAT Sensor 2 signal is more than the absolute temperature difference between the ECT signal and the IAT Sensor 1 signal.
| Action Taken When the DTCs Set |
DTC P0096 and P0111 are Type B DTCs.
| Conditions for Clearing the MIL/DTC |
DTC P0096 and P0111 are Type B DTCs.
| Diagnostic Aids |
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An IAT sensor that is skewed lower at various ambient temperatures, due to greater resistance than is normal, can widen the spread between the sensors and cause a DTC to set. Measure and record the resistance of the IAT sensor 1 and IAT sensor 2 at various ambient temperatures, and then compare those measurements to the
Temperature Versus Resistance (IAT 2)
Temperature Versus Resistance (ECT)
Temperature Versus Resistance (IAT)
IAT and IAT 2 tables.
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Inspect both IAT sensors' terminals, for corrosion or a poor connection.
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The Intake Manifold Pressure and Air Temperature Sensor may also be refered to as Turbocharger Boost Sensor or Intake Air Pressure and Temperature Sensor.
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| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| Note | ||
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Perform Step 1 of this verification procedure only if the ignition has been OFF for 8 hours or more.
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The vehicle sitting in direct sun light or having the block heater ON will skew the results.
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| 1. |
Ignition ON, observe the following scan tool parameters. The readings should be within 19°C (34°F) of each other.
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IAT Sensor 1
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IAT Sensor 2
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Start-Up ECT Sensor
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| 2. |
Engine idling, verify the appropriate scan tool parameters' are within the specified ranges. The readings depend on the current ambient temperature and the vehicle operating conditions.
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-39 to +149°C (-38 to +300°F); IAT Sensor 1
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-39 to +142°C (-38 to +288°F); IAT Sensor 2
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-39 to +120°C (-38 to +248°F); ECT
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| 3. |
Operate the vehicle within the Conditions for Running the DTC to verify that the DTC has not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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| Circuit/System Testing |
| Note | ||
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You must perform the circuit/system verification before proceeding with circuit/system testing. |
| 1. |
Verify that DTCs P0097, P0098, P0112, P0113, P0116, P0117, P0118, P0119, or P0128 are not set.
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| 2. |
If any of the DTCs are set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle
for further diagnosis.
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| 3. |
Ignition OFF, disconnect the harness connector at the appropriate IAT sensor as determined in the Circuit/System Verification.
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| 4. |
Ignition OFF, all vehicle systems OFF. This may take up to 2 minutes; test for less than 5 Ω between the appropriate low reference circuit and ground.
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IAT 1; low reference circuit terminal 4 or D
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IAT 2; low reference circuit terminal 1 or A
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| 5. |
If greater than the specified range, test the appropriate low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 6. |
Ignition ON, verify the appropriate scan tool IAT sensor parameter is colder than -39°C (-38°F).
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| 7. |
If warmer than the specified range, test the appropriate signal circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
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| 8. |
Install a 3 A fused jumper wire between the appropriate signal circuit and the appropriate low reference circuit.
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IAT 1; signal circuit terminal 5 or E, low reference circuit terminal 4 or D
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IAT 2; signal circuit terminal 2 or B, low reference circuit terminal 1 or A
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| 9. |
Verify the appropriate scan tool IAT sensor parameter is warmer than:
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IAT 1; 149°C (300°F)
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IAT 2; 142°C (288°F)
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| 10. |
If colder than the specified range, test the appropriate signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 11. |
If all circuits test normal, test or replace appropriate IAT sensor.
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| Component Testing |
Measure and record the resistance of the MAF/IAT sensor and IAT sensor 2 at various ambient temperatures, and then compare those measurements to the Temperature Versus Resistance (IAT 2) Temperature Versus Resistance (ECT) Temperature Versus Resistance (IAT) IAT and IAT 2 tables.
| Repair Instructions |
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Mass Airflow Sensor Replacement
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Intake Air Pressure and Temperature Sensor Replacement
for Intake Manifold Pressure and Air Temperature Sensor
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Control Module References
for ECM replacement, setup, and programming
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| Repair Verification |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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