Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 146 (ENGINE CONTROL SYSTEM - 3.6L (LY7) - DTC P0008 TO DTC P0133)DTC P0132TEST DESCRIPTION
2006 Buick Terraza CXL, 3.5 L, AWD
Test Description
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Test Description
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step determines if the condition exists. If there is a short to voltage condition with the HO2S circuits, the ECM commands open loop for the applicable sensor.
- 4: This step tests for a bias voltage across the reference voltage circuit and the low reference circuit of the HO2S. The bias voltage that you are measuring, is the voltage difference between the reference voltage circuit and the low reference circuit. If the reference voltage circuit or the low reference circuit of the HO2S is shorted to a voltage, the bias voltage will be more than the specified value, which indicates there is a condition with the circuits.
- 5: This step tests for a short to voltage on the input pumping current circuit and the pump current circuit of the HO2S. The input pumping current circuit and the pump current circuit are connected internally within the ECM. If one of the circuits are shorted to voltage, the other circuit will be affected.
- 7: This step isolates if the condition is with the reference voltage circuit or the low reference circuit. If the voltage is less than the specified value, the condition is with low reference circuit.
- 11: This step inspects the harness connector for water intrusion, corrosion and bent or damaged pins.
- 12: This step inspects the harness connector for water intrusion, corrosion and bent or damaged pins.
DTC P0132
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
- | Go to Step 3 | Go to Step 4 |
| 3 |
|
- | Go to Step 4 | Go to Diagnostic Aids |
| 4 |
|
350-550 mV | Go to Step 5 | Go to Step 7 |
| 5 | Measure the voltage between the input pump current circuit and a good ground with a DMM. Is the voltage less than the specified value? |
1 V | Go to Step 10 | Go to Step 6 |
| 6 |
|
- | Go to Step 15 | Go to Step 12 |
| 7 | Measure the voltage between the reference voltage circuit of the HO2S and a good ground with a DMM. Refer to Circuit Testing
in Wiring Systems. Is the voltage more than the specified value? |
3.5 V | Go to Step 8 | Go to Step 9 |
| 8 | Test the reference voltage circuit of the HO2S for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 9 | Test the low reference circuit of the HO2S for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 10 | Test for the following conditions:
Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 11 |
| 11 | Test for shorted terminals and poor connections at the HO2S. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 13 |
| 12 | Test for shorted terminals and poor connections at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 14 |
| 13 | Replace the HO2S. Refer to Heated Oxygen Sensor Replacement - Position 1
. Did you complete the replacement? |
- | Go to Step 15 | - |
| 14 | Replace the ECM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
- | Go to Step 15 | - |
| 15 |
|
- | Go to Step 2 | Go to Step 16 |
| 16 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |
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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.