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HOMESERVICE MANUALSDODGE AND RAM2011JOURNEY R/T, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (2.4L - DTCS P000A TO P0443)DIAGNOSIS AND TESTINGP0037-O2 SENSOR 1/2 HEATER CIRCUIT LOWDIAGNOSTIC TEST
2011 Dodge and Ram Journey R/T, AWD

Diagnostic Test

2011 Dodge and Ram Journey R/T, AWDSECTION Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
  1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    1. Start the engine and allow it to idle for at least 60 seconds.
      WARNING:

      When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

    2. With a scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2.

      No 

  2. O2 SENSOR 1/2 HEATER ELEMENT 
    1. Turn the ignition off.
      NOTE:

      Allow the O2 Sensor to cool down to room temperature.

    2. Disconnect the O2 Sensor 1/2 harness connector.
    3. Measure the resistance across the O2 Sensor 1/2 Heater element, between the O2 Sensor 1/2 Heater Control terminal and the O2 Sensor 1/2 Heater ground terminal at the component.
      NOTE:

      O2 Heater Element resistance values should be measured at 21.1° C (70° F). The resistance value will vary with different temperature values.

      Is the O2 Sensor Heater Element resistance between 2.0 and 30.0 Ohms?

      Yes 

      • Go To  3.

      No 

      • Verify that there is good pin to terminal contact in the O2 Sensor 1/2 and Powertrain Control Module connectors. If OK, replace the O2 Sensor. Refer to SENSOR, OXYGEN, REMOVAL .
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  3. (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND 
    Fig 1: Checking O2 Sensor Heater Control Circuit For Short To Ground
    GC0138737Courtesy of CHRYSLER LLC
    1. Disconnect the PCM C2 harness connector.
    2. Measure the resistance between ground and the (K299) O2 Sensor 1/2 Heater Control circuit in the O2 Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short to ground in the (K299) O2 Sensor 1/2 Heater Control circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  4.
  4. EXCESSIVE RESISTANCE IN THE (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT 
    Fig 2: Checking O2 Sensor 1/2 Heater Control Circuit For Open
    GC0149863Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (K299) O2 Sensor 1/2 Heater Control circuit between the O2 Sensor 1/2 harness connector and the PCM C2 harness connector.

      Is the resistance below 0.5 Ohm?

      Yes 

      • Go To  5.

      No 

      • Repair the excessive resistance in the (K299) O2 Sensor 1/2 Heater Control circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  5. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen 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. Verify that there is good pin to terminal contact in the O2 Sensor 1/2 and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Replace and program the Powertrain Control Module in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.