1999 Dodge Durango codes

P0132 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 1)
P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
Hi there,
Thank you for the donation,

As you can see these are both O2 sensor problems, start with checking the sensors and the wiring back to the ECU, check for faulty loom plugs, or heat affected wiring.

Mark (mhpautos)

Hi COMERCIALAUTOSERVICE,

Here are the diagnostics.

DTC P0132: 1/1 O2 SEN SHORTED TO VOLTAGE

NOTE:
1/1 HO2S is located in upstream position, near inlet end of catalytic converter.

NOTE:
DTC P0132: 1/1 O2 SEN SHORTED TO VOLTAGE is monitored with engine running for more than 2 minutes and engine coolant temperature reaches 170 °F (76.7 °C). DTC may be stored in Powertrain Control Module (PCM) when PCM senses that 1/1 Heated Oxygen Sensor (HO2S) voltage is more than 1.2 volts. Possible causes are: defective 1/1 HO2S, defective PCM, defective connectors or defective wiring.

1. Start engine and warm to temperature more than 180 °F (82.2 °C). Leave engine running for 4 minutes. Using scan tool, read 1/1 HO2S voltage. If voltage is more than 1.5 volts, go to next step. If voltage is 1.5 volts or less, go to step 8).

2. Ensure ignition is off. Disconnect PCM connectors. PCM is located in engine compartment. Clean and/or repair connectors as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on PCM connector, 1/1 HO2S signal circuit (Tan/White wire). If voltage is 5 volts or less, go to next step. If voltage is more than 5 volts, repair signal circuit for short to voltage. Perform TEST VER-5A.

3. Ensure ignition is off. Ensure PCM connectors are still disconnected. Turn ignition on, with engine off. Using voltmeter, check and monitor voltage on PCM connector, 1/1 HO2S signal circuit (Tan/White wire) while wiggling 1/1 HO2S connector and wiring harness. If voltage changes while wiggling wiring harness, repair short to voltage in signal circuit. Perform TEST VER-5A. If voltage does not change, go to next step.

4. Ensure PCM connectors are still disconnected. Turn ignition on, with engine off. Using scan tool, read 1/1 HO2S voltage. If voltage is 4.97 volts or less, replace 1/1 HO2S. Perform TEST VER-5A. If voltage is more than 4.97 volts, go to next step.

5. Turn ignition off. Disconnect 1/1 HO2S connector. Clean and/or repair connector as necessary. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, go to next step.

6. Turn ignition off. Ensure PCM connectors are still disconnected. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, go to next step.

7. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.

8. Start engine and warm to temperature more than 180 °F (82.2 °C). Leave engine running for 4 minutes. Using scan tool, read and monitor 1/1 HO2S voltage while wiggling connector and wiring harness. If voltage is 1.5 volts or less at any time, go to next step. If voltage is more than 1.5 volts at any time, repair intermittent short to voltage in wiring harness. Perform TEST VER-5A.

9. Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, test is complete.

DTC P0138: 1/2 O2S SHORTED TO VOLTAGE

NOTE:
1/2 HO2S is located in downstream position, on uotlet end of catalytic converter.

NOTE:
DTC P0138: 1/2 O2S SHORTED TO VOLTAGE is monitored with engine running for more than 2 minutes and engine coolant temperature at more than 170 °F (76.7 °C). DTC may be stored in Powertrain Control Module (PCM) when PCM senses that 1/2 Heated Oxygen Sensor (HO2S) voltage is more than 1.2 volts. Possible causes are: defective 1/2 HO2S, defective PCM, defective connectors or defective wiring.

1. Start engine and warm to temperature more than 170 °F (76.7 °C). Leave engine running for 5 minutes. Using scan tool, read 1/2 HO2S voltage. If voltage is more than 4.97 volts, go to next step. If voltage is 4.97 volts or less, go to step 4).

2. Turn ignition off. Disconnect 1/2 HO2S connector. Clean and/or repair connector as necessary. Start engine and allow it to idle for at least 5 minutes. Using scan tool, read 1/2 HO2S voltage. If voltage is 4.97 volts or less, go to next step. If voltage is more than 4.97 volts, repair 1/2 HO2S signal circuit (Orange/Black wire) for short to voltage, or check governor pressure sensor circuit. Perform TEST VER-5A.

3. At this time, 1/2 HO2S is assumed to be defective. Replace 1/2 HO2S. Perform TEST VER-5A.

4. Turn engine off. Start engine and allow it to idle. Using scan tool, read and monitor 1/2 HO2S voltage while wiggling 1/2 HO2S connector and wiring harness. If voltage is 1.2 volts or less at any time, go to next step. If voltage is more than 1.2 volts at any time, repair intermittent short to voltage in wiring harness. Perform TEST VER-5A.

5. Turn ignition off. Disconnect 1/2 HO2S connector. Clean and/or repair connector as necessary. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, test is complete.