Skip to content
Tahoe / Yukon Service Manual

DTC P00EA-P00EC

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5507625 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P00EA Intake Air Temperature Sensor 3 Circuit Low DTC P00EB Intake Air Temperature Sensor 3 Circuit High DTC P00EC Intake Air Temperature Sensor 3 Circuit Erratic Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performanc
Signal P00EA, P00EB P00E9, P00EB, P00EC P00EA, P00EB* P00E9
Low Reference — P00E9, P00EB, P00EC P00EA, P00EC* —
* Internal control module or component damage may occur if the circuit shorts to B+.

Typical Scan Tool Data Intake Air Temperature Sensor 3

Circuit Short to Ground Open Short to Voltage
Operating Conditions: Engine = Idling Parameter Normal Range: −39 to +129°C (−38 to +264°F)
Signal 150°C (302°F) −40°C (−40°F) −40°C (−40°F)
Low Reference — −40°C (−40°F) −40°C (−40°F)

Circuit/System Description

Circuit Description
Signal The control module input circuit has an internal resistance connected to 5 V.
Low Reference Grounded through the control module.
Component Description
B65 Intake Manifold Pressure and Air Temperature Sensor The intake air temperature sensor 3 and the intake manifold pressure sensor are integrated in the same housing, which is located behind the throttle body.
K20 Engine Control Module The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.

Conditions for Running the DTC Engine = Running Ignition and Start Signal = Greater than 11 V Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC P00EA Intake Air Temperature Sensor 3 = Warmer than 149°C (300°F) — For greater than 5 s P00EB Intake Air Temperature Sensor 3 = Colder than −60°C (−76°F) — For greater than 5 s P00EC Intake Air Temperature Sensor 3 = Signal noisy or erratic — For greater than 5 s Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A DTC Reference Information Schematic Reference Engine Controls Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify the scan tool parameter: Intake Air Temperature Sensor 3 = −39 to 149°C (−38 to 300°F) and changes ⇒ If not between −39 and 149°C (−38 and 300°F) or does not change Refer to: Circuit/System Testing ⇓ If between −39 and 149°C (−38 and 300°F) and changes
  3. Verify the scan tool parameter: Intake Air Temperature Sensor 3 = The value should not spike or drop out. Perform the action while monitoring the parameter: Wiggle the harness and connector: B65 Intake Manifold Pressure and Air Temperature Sensor Wiggle the harness and connector: K20 Engine Control Module ⇒ If the value spikes or drops out Repair as necessary » Wiring / Terminal(s) / Electrical Connector(s) ⇓ If the value does not spike or drop out
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC does not set
  5. All OK. Circuit/System Testing
  1. Ignition/Vehicle & All vehicle systems » Off
  2. Disconnect the electrical connector: B65 Intake Manifold Pressure and Air Temperature Sensor
  3. Test for less than 5 Ω between the test points: Low Reference circuit terminal 3 & Ground ⇒ If 5 Ω or greater 3.1. Disconnect the appropriate electrical connector: K20 Engine Control Module 3.2. Test for less than 2 Ω between the test points: Low Reference circuit terminal 3 @ Component harness & The other end of the circuit @ Control module harness ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇒ If less than 2 Ω » Replace the component: K20 Engine Control Module ⇓ If less than 5 Ω
  4. Ignition » On / Vehicle » In Service Mode
  5. Verify the scan tool parameter: Intake Air Temperature Sensor 3 = Colder than −39°C (−38°F) ⇒ If 39°C (38°F) or warmer 5.1. Ignition/Vehicle » Off 5.2. Disconnect the appropriate electrical connector: K20 Engine Control Module 5.3. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component harness & Ground ⇒ If less than infinite resistance » Repair the short to ground on the circuit. ⇒ If infinite resistance » Replace the component: K20 Engine Control Module ⇓ If colder than −39°C (−38°F)
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & Low Reference circuit terminal 3
  7. Verify the scan tool parameter: Intake Air Temperature Sensor 3 = Warmer than 149°C (300°F) ⇒ If 149°C (300°F) or colder 7.1. Ignition/Vehicle » Off & Remove » Jumper wire(s) 7.2. Disconnect the appropriate electrical connector: K20 Engine Control Module 7.3. Ignition » On / Vehicle » In Service Mode 7.4. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness & Ground ⇒ If 1 V or greater » Repair the short to voltage on the circuit. ⇓ If less than 1 V 7.5. Ignition/Vehicle » Off 7.6. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness & The other end of the circuit @ Control module harness ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇒ If less than 2 Ω » Replace the component: K20 Engine Control Module ⇓ If warmer than 149°C (300°F)
  8. Test or replace the component: B65 Intake Manifold Pressure and Air Temperature Sensor Component Testing
  9. Ignition/Vehicle » Off
  10. Disconnect the electrical connector: B65 Intake Manifold Pressure and Air Temperature Sensor
  11. Test for 54 to 54,224 Ω between the test points: Signal terminal 1 & Low Reference terminal 3 ⇒ If not between 54 and 54,224 Ω Replace the component: B65 Intake Manifold Pressure and Air Temperature Sensor ⇓ If between 54 and 54,224 Ω
  12. Verify the value is within the range listed in the table: Temperature Versus Resistance - Intake Air Temperature Sensor ⇒ If not in the specified range Replace the component: B65 Intake Manifold Pressure and Air Temperature Sensor ⇓ If in the specified range
  13. Test for infinite resistance between the test points: Each terminal of the component & The component’s housing ⇒ If less than infinite resistance Replace the component: B65 Intake Manifold Pressure and Air Temperature Sensor ⇓ If infinite resistance
  14. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Intake Air Pressure and Temperature Sensor Replacement For control module replacement, programming, and setup refer to: Control Module References