Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- The PCM will turn OFF the malfunction indicator lamp (MIL) during the third consecutive trip in which the diagnostic runs and passes.
- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using a scan tool.
DTC P0120
| 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 |
|
0.27 V 4.67 V |
Go to Step 5 | Go to Step 3 |
| 3 | Is DTC P2135 also set? | - | Go to Diagnostic Trouble Code (DTC) List - Vehicle | Go to Step 4 |
| 4 |
|
- | Go to Step 5 | Go to Intermittent Conditions |
| 5 |
|
0 V | Go to Step 6 | Go to Step 11 |
| 6 |
|
5 V | Go to Step 7 | Go to Step 8 |
| 7 | Probe the TP sensor low reference circuit with a test lamp connected to B+. Does the test lamp illuminate? |
- | Go to Step 17 | Go to Step 13 |
| 8 | Measure the voltage of the TP sensor 1 5-volt reference circuit with a DMM. Does the DMM indicate voltage at the specified value? |
5 V | Go to Step 10 | Go to Step 9 |
| 9 | Does the DMM indicate voltage less than the specified value on the TP sensor 1 5-volt reference circuit? | 5 V | Go to Step 14 | Go to Step 16 |
| 10 | Test the TP sensor 1 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 21 | Go to Step 12 |
| 11 | Test the TP sensor 1 signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 19 |
| 12 | Test the TP sensor 1 signal circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 19 |
| 13 | Test the TP sensor 1 low reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 19 |
| 14 | Test the TP sensor 1 5-volt reference circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 15 |
| 15 | Test the TP sensor 1 5-volt reference circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 19 |
| 16 | Test the TP sensor 1 5-volt reference circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | - |
| 17 | Test for an intermittent and for a poor connection at the throttle body. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 18 |
| 18 | Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement
. Did you complete the replacement? |
- | Go to Step 21 | - |
| 19 | Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 21 | Go to Step 20 |
| 20 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 21 | - |
| 21 |
|
- | Go to Step 2 | Go to Step 22 |
| 22 | 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 |