P10D0
DTC P10D0
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P10D0
- Reductant Injector Temperature - Exhaust Gas Temperature 2 Correlation
Typical Scan Tool Data
Circuit/System Description
The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the diesel oxidation catalyst as well as the inlet and outlet of the Diesel Particulate Filter (DPF). The Engine Control Module (ECM) supplies a bias 5-volt signal to the exhaust gas temperature sensor signal circuit, and supplies a ground to the low reference circuit. The exhaust gas temperature information is used by the ECM during the particulate filter cleaning process.
Conditions for Running the DTC
* The ignition has been OFF for greater than 8 hours.
* Reductant dosing has not been requested by the ECM.
* The engine is running for less than 10 s.
* The ambient air temperature is greater than -60°C (-76°F)
* Battery voltage is greater than 11 V
* DTC P10D0 runs once per key cycle when the above conditions are met.
Conditions for Setting the DTC
An implausible injector coil temperature is detected by comparing the coil temperature with the EGT sensor 2 as a reference temperature. This is done after a sufficient engine off time and before the coil has been energized. If the absolute difference between the coil and reference temperature is greater than a calibrated threshold, then P10D0 is set.
Action Taken When the DTC Sets
DTC P10D0 is a Type B DTC
Conditions for Clearing the DTC
DTC P10D0 is a Type B DTC
Diagnostic Aids
A slight to moderate resistance in either the signal or low reference circuits, can widen the spread between the exhaust gas temperature sensors and the reductant injector, and cause the DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics (LGH or LML) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation
Exhaust Aftertreatment System Description Exhaust Aftertreatment System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Special Tools
J 25070 - Heat Gun 500-750°F
Circuit/System Verification
Note: Determine the ambient temperature by using an accurate thermometer.
1. Ignition OFF for greater than 8 hours.
2. Observe the scan tool EGT Sensor 2 parameter and compare it to the ambient temperature. The reading for EGT 2 should be within 30°C (54°F) of the ambient temperature.
• If not within the specified range
Refer to Circuit/System Testing.
• If within the specified range
3. Ignition ON
4. Observe the scan tool EGT Sensor 2 parameter. The reading should be between -40-999°C (-40-1,830°F) depending on the current ambient temperature and the vehicle operating conditions
• If not within the specified range
Refer to Circuit/System Testing.
• If within the specified range
5. 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.
6. Verify a DTC does not set
• If any DTCs set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
• If no DTCs set
7. All OK
Circuit/System Testing
Note: Perform the Repair Verification after completing the Circuit/System Testing.
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B131 EGT 2 sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the low reference circuit terminal B and ground.
• If 5 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If less than 5 ohms
3. Ignition ON.
4. Verify the scan tool EGT 2 sensor parameter is greater than 998°C (1828°F).
• If 998°C (1828°F) or less
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for infinite resistance between the signal circuit terminal A and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K20 engine control module.
• If greater than 998°C (1828°F)
5. Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B.
6. Verify the scan tool EGT Sensor 2 parameter is less than -35°C (-31°F).
• If -35°C (-31°F) or greater
1. Ignition OFF, disconnect the harness connector at the K20 engine control module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Ignition OFF
4. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If less than -35°C (-31°F)
Note: Perform the Repair Verification after completing the Circuit/System Testing.
7. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at theQ61 emission reduction fluid injector. It may take up to 2 minutes for all vehicle systems to power down.
8. Test for less than 15 ohms between the low reference circuit terminal 1 and the control circuit terminal 2.
• If 15 ohms or greater
Replace the Emission Reduction Fluid Injector Replacement Service and Repair emission reduction fluid injector
• If less than 15 ohms
9. Test or replace the B131 Exhaust Gas Temperature sensor 2.
Component Testing
Note: The J 25070 Heat Gun 500-750°F may be used to evaluate the sensor under high temperature conditions.
1. Ignition OFF, remove the B131 EGT sensor 2 while leaving the harness connector connected.
2. Measure and record the resistance of the B131 EGT sensor 2 and compare the measurements to the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors) chart.
• If the B131 EGT sensor does not correspond to the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors) chart
Replace the B131 EGT sensor 2.
• If the B131 EGT sensor does correspond to the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors) chart
3. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Exhaust Temperature Sensor Replacement - Position 2 Exhaust Temperature Sensor Replacement - Position 2
* Emission Reduction Fluid Injector Replacement Service and Repair
* Control Module References Control Module References for ECM replacement, setup and programming