PRE-RELEASE
DTC P0097 or P0098
| DTC P0097 or P0098 |
| 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 Descriptors |
DTC P0097
Intake Air Temperature (IAT) Sensor 2 Circuit Low Voltage
DTC P0098
Intake Air Temperature (IAT) Sensor 2 Circuit High Voltage
| Diagnostic Fault Information |
| 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 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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| Circuit/System Description |
The intake air temperature (IAT) sensor 2 is an integral part of the intake manifold pressure and air temperature sensor. IAT sensor 2 is a variable resistor that measures the temperature of the air after the turbocharger and the charge air cooler (CAC), but before it enters the engine intake manifold. The engine control module (ECM) supplies 5 volts to the IAT sensor 2 signal circuit and a ground for the low reference circuit.
| Conditions for Running the DTC |
P0097
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The ignition is ON or the engine is running.
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This DTC runs continuously within the enabling conditions.
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P0098
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The engine is running.
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This DTC runs continuously within the enabling conditions.
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| Conditions for Setting the DTC |
P0097
The ECM detects that the IAT sensor 2 is warmer than 140°C (284°F) for greater than 15 s at idle.P0098
The ECM detects that the IAT sensor 2 is colder than -39°C (-38°F) for greater than 15 s at idle.| Action Taken When the DTC Sets |
DTCs P0097, P0098 are Type B DTCs.
| Conditions for Clearing the MIL/DTC |
DTCs P0097, P0098 are Type B DTCs.
| Diagnostic Aids |
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Depending on the output from the turbocharger, an IAT sensor 2 signal circuit that is shorted to the intake air pressure signal circuit may cause the IAT Sensor 2 parameter response to be erratic or become stuck at a given value.
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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 9°C (16°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, observe the scan tool IAT Sensor 2 parameter. The reading should be between -39 to +130°C (-38 to +266°F) depending on the current ambient temperature and the vehicle operating conditions.
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| 3. |
Operate the vehicle within the conditions for running the DTC to verify the DTC does 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 |
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You must perform the circuit/system verification before proceeding with circuit/system testing. |
| 1. |
Verify that debris is not blocking the airflow through the CAC.
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| 2. |
Ignition OFF, disconnect the harness connector at the B65 Intake Manifold Pressure and Air Temperature Sensor.
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| 3. |
Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the low reference circuit terminal 1 or A and ground. |
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Warning
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If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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Ignition ON, verify the scan tool IAT Sensor 2 parameter is colder than -39°C (-38°F).
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| 6. |
If warmer than the specified range, test the signal circuit terminal 2 or B for a short to ground. If the circuit tests normal, replace the K20 ECM.
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| 7. |
Install a 3 A fused jumper wire between the signal circuit terminal 2 or B and ground. Verify the scan tool IAT Sensor 2 parameter is warmer than 142°C (288°F). |
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| 8. |
If colder than the specified range, test the 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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| 9. |
If the circuits test normal, test or replace the B65 Intake Manifold Pressure and Air Temperature Sensor.
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| Component Testing |
Measure and record the resistance of the IAT sensor 2 at various ambient temperatures, then compare those measurements to the Temperature Versus Resistance (IAT 2) Temperature Versus Resistance (ECT) Temperature Versus Resistance (IAT) table.
| Repair Instructions |
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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.
