Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: When the system is operating correctly, the HO2S 1 voltage should toggle above and below the specified values. You may need to operate the vehicle within the Freeze Frame conditions and Conditions for Setting the DTC in order to duplicate the malfunction that was detected by the PCM.
- 4: The specified value is what is measured on a correctly operating system.
- 5: The specified value is what is measured on a correctly operating system.
DTC P1133
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module 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 |
| 2 |
IMPORTANT:
If any other DTCs are set except for heated oxygen sensor (HO2S) DTCs, refer to the other DTCs first before proceeding with this table.
|
250-500 mV | Go to Step 3 | Go to Step 4 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
350-550 mV | Go to Step 5 | Go to Step 9 |
| 5 |
|
20 mV | Go to Step 6 | Go to Step 11 |
| 6 |
|
- | Go to Step 7 | Go to Step 12 |
| 7 |
|
- | Go to Step 15 | Go to Step 8 |
| 8 | Does the test lamp remain illuminated with each command? | - | Go to Step 13 | Go to Step 14 |
| 9 | Test the HO2S 1 high signal circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 10 |
| 10 | Test the HO2S 1 low signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 17 |
| 11 | Test the HO2S 1 low signal circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 17 |
| 12 |
|
- | Go to Step 20 | Go to Step 16 |
| 13 | Test the HO2S 1 heater low control circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 17 |
| 14 | Test the HO2S 1 heater low control circuit for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 17 |
| 15 |
IMPORTANT:
Before replacing the HO2S 1, inspect and remove any source of contamination. Inspect for the following conditions:
|
- | Go to Step 20 | Go to Step 16 |
| 16 | Inspect for poor connections at the harness connector of the HO2S 1. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 18 |
| 17 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 20 | Go to Step 19 |
| 18 |
NOTE:
Refer to Heated Oxygen Sensor Resistance Learn Reset Notice
. Replace the HO2S 1. Refer to Heated Oxygen Sensor 1 Replacement
.Did you complete the replacement? |
- | Go to Step 20 | - |
| 19 | Replace the PCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
- | Go to Step 20 | - |
| 20 |
|
- | Go to Step 2 | Go to Step 21 |
| 21 | 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 | System OK |