2012 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

P2033-EXHAUST GAS TEMPERATURE SENSOR CIRCUIT HIGH - BANK 1 SENSOR 2

P2033-EXHAUST GAS TEMPERATURE SENSOR CIRCUIT HIGH - BANK 1 SENSOR 2

For a complete wiring diagram, refer to the Wiring Information.



Possible Causes

(K380) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K380) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
(K385) SENSOR RETURN CIRCUIT OPEN/HIGH RESISTANCE
EXHAUST GAS TEMPERATURE SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


1. DTC IS ACTIVE

1. Ignition on, engine not running.
2. With the scan tool, select View DTCs.


Is the status Active for this DTC?

Yes


No


2. CHECK THE (K380) EXHAUST GAS TEMPERATURE SENSOR 1/2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K380) Exhaust Gas Temperature Sensor 1/2 Signal circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector.


Is the voltage above 5.2 Volts?

Yes


No


3. CHECK THE (K380) EXHAUST TEMPERATURE SENSOR 1/2 SIGNAL FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance of the (K380) Exhaust Gas Temperature Sensor 1/2 Signal circuit between the Exhaust Gas Temperature Sensor 1/2 harness connector and the PCM C1 harness connector.


Is the resistance below 5.0 Ohms?

Yes


No


4. CHECK THE (K385) SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (K385) Sensor Return circuit between the Exhaust Gas Temperature Sensor 1/2 harness connector and the PCM C1 harness connector.


Is the resistance below 5.0 Ohms?

Yes


No


5. EXHAUST GAS TEMPERATURE SENSOR 1/2
1. Turn the ignition off.
2. Reconnect the Exhaust Gas Temperature Sensor 1/2 harness connector.
3. Reconnect the PCM C1 harness connector.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Turn the ignition off.
7. Disconnect the Exhaust Gas Temperature Sensor 1/2 harness connector.
8. Connect a jumper wire between the (K380) Exhaust Gas Temperature Sensor 2 Signal circuit and the (K385) Sensor Return circuit at the Exhaust Gas Temperature Sensor 1/2 harness connector.
9. Turn the ignition on.
10. With the scan tool, select View DTCs.


NOTE: The scan tool should display a P2032-Exhaust Gas Temperature Sensor Circuit Low DTC with the jumper wire in place.


Does the scan tool display the DTC as described above?

Yes


No


6. POWERTRAIN CONTROL MODULE

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Exhaust Gas Temperature Sensor 1/2 and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.


Were any problems found?

Yes


No