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Home >> Chrysler >> 2004 >> Sebring Limited, 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Powertrain Diagnostic Procedures - NGC DRIVEABILITY Symptoms, NGC DRIVEABILITY Diagnostic Tests DTCS P0016 To P0461 - Except Coupe >> DRIVEABILITY - NGC - Diagnostic Tests >> DTC P0031: O2 Sensor 1/1 Heater Circuit Low, P0037: O2 Sensor 1/2 Heater Circuit Low >> Possible Causes

Possible Causes

O2 SENSOR HEATER OPERATION

O2 HEATER ELEMENT

O2 HEATER CONTROL CIRCUIT

O2 HEATER CONTROL SHORTED TO GROUND

PCM

DIAGNOSTIC PROCEDURE - P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW

TEST ACTION
1 Ignition on, engine not running.
With the DRBIII®, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
  1. Yes --> Go To 3
  2. No --> Go To 2
2 Turn the ignition off.
NOTE: Allow the O2 Sensor to cool down before continuing the test. The O2 Sensor voltage should stabilize at 5.0 volts. Raising the hood may help in reducing under hood temps quicker.

Ignition on, engine not running.
With the DRBIII®, actuate the O2 Heater Test.
With the DRBIII®, monitor O2 Sensor voltage for at least 2 minutes.
Does the O2 Sensor voltage stay above 4.5 volts?
  1. Yes --> Go To 3
  2. No --> Refer to the INTERMITTENT CONDITION  symptom in the Driveability category.

    Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .
3 Turn the ignition off.
NOTE: Allow the O2 sensor to cool down to room temperature.

Disconnect the O2 Sensor harness connector.
Measure the resistance across the O2 Sensor Heater element component side.
NOTE: Heater Resistance Specification: 1/1 and 2/1 = 3.0 to 4.0 ohms or 1/2 and 2/2 = 4.0 to 5.0 ohms.

Is the O2 Sensor Heater element within specification?
  1. Yes --> Go To 4
  2. No --> Replace the O2 Sensor.

    Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .
4 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
With the DRBIII®, actuate the O2 Heater Test.
Using a 12-volt test light connected to ground, probe the O2 Heater Control circuit in the O2 Sensor harness connector.
Does the test illuminate brightly and flash on and off?
  1. Yes --> Replace the O2 Sensor.

    Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .

  2. No --> Go To 5
5 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the O2 Heater Control circuit in the O2 Sensor harness connector.
Is the resistance below 5.0 ohms?
  1. Yes --> Repair the short to ground in the O2 Sensor Heater Control circuit.

    Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .

  2. No --> NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. Replace and program the Powertrain Control Module in accordance with the Service Information.

    Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC .
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