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.
Diagnostic Monitoring Test Results
The purpose of this test mode is to allow access to the results of OBD II monitor diagnostic test results. The test values that are stored at the time of the particular monitor completion are displayed when the particular test identification is requested. Refer to the following table for test information.
| Module ID h(1) | Test ID h(1) | Component ID h(1) | Test Description | ||||
|---|---|---|---|---|---|---|---|
| Oxygen Sensor Monitor (01-0F) | |||||||
| 10 | 01 | 11 | Sensor Voltage Amplitude-Bank 1, Sensor 1 | ||||
| 10 | 01 | 21 | Sensor Voltage Amplitude-Bank 2, Sensor 1 | ||||
| 10 | 02 | 11 | Upstream Static Shift, Lean Shift on EGO11 | ||||
| 10 | 02 | 11 | Upstream Static Shift, Rich Shift on EGO11 | ||||
| 10 | 02 | 21 | Upstream Static Shift, Lean Shift on EGO21 | ||||
| 10 | 02 | 21 | Upstream Static Shift, Rich Shift on EGO21 | ||||
| 10 10 |
03 03 |
01 02 |
Upstream Switchpoint Downstream Switchpoint |
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| Catalyst Monitor (10-1F) | |||||||
| 10 | 10 | 11 | Rear to Front Switch Ratio Test-Bank 1 test | ||||
| 10 | 10 | 21 | Rear to Front Switch Ratio Test-Bank 2 test | ||||
| Evaporative Monitor (21-2F) | |||||||
| 10 | 21(2) | 00 | Fuel Tank Pressure test-Low | ||||
| 10 | 21 (2) | 00 | Fuel Tank Pressure test-High | ||||
| 10 | 22 (2) | 00 | Evap-Phase 2 change in pressure test | ||||
| 10 | 23 (2) | 00 | Evap-Phase 4 change in pressure too large | ||||
| 10 | 24 (2) | 00 | Evap-Phase 4 change in pressure too small | ||||
| 10 | 25 (2) | 00 | Evap-Phase 4 pressure build test-upper limit | ||||
| 10 | 26 | 00 | Phase 0 initial tank vacuum and minimum limit | ||||
| 10 | 26 | 00 | Phase 0 initial tank vacuum and maximum limit | ||||
| 10 | 27 | 00 | Phase 2 0.040" cruise leak check vacuum bleed-up and max 0.04" leak threshold | ||||
| 10 | 28 | 00 | Phase 2 0.020" cruise leak check vacuum bleed-up and max leak threshold | ||||
| 10 | 29 | 00 | EVAP-Phase 4 change in pressure too small | ||||
| 10 | 2A | 00 | Phase 4 vapor generation maximum change in pressure and maximum threshold | ||||
| 10 | 2B | 00 | Phase 4 vapor generation maximum absolute pressure rise and maximum threshold | ||||
| 10 | 2C | 00 | Phase 2 0.020" idle leak check vac bleed-up and max leak threshold | ||||
| 10 | 2D | 00 | Phase 2 0.020" idle leak check vacuum bleed-up and max no-leak threshold | ||||
| Secondary Air Monitor (30-3F) | |||||||
| 10 | 30 | 11 | O2S11 rich during flow test | ||||
| 10 | 30 | 21 | O2S21 rich during flow test | ||||
| 10 | 30 | 12 | O2S12 rich during flow test | ||||
| 10 | 31 | 00 | O2Ss lean timer test | ||||
| 10 | 31 | 01 | O2Ss lean timer test | ||||
| EGR System Monitor (41-4F) | |||||||
| 10 | 41 (2) | 11 | Upstream hose disconnected test | ||||
| 10 | 41 (2) | 12 | Downstream hose disconnected test | ||||
| 10 | 45 | 20 | Stuck Open Valve Test | ||||
| 10 | 49 | 30 | EGR Flow Test | ||||
| 10 | 4B | 30 | Flow test | ||||
| Misfire Monitor (51-5F) | |||||||
| 10 | 50 | 00 | Total Misfires that exceeded threshold | ||||
| 10 | 53 | 01 | Misfire rate per 200 revs for Cylinder 1/Type A | ||||
| 10 | 53 | 02 | Misfire rate per 200 revs for Cylinder 2/Type A | ||||
| 10 | 53 | 03 | Misfire rate per 200 revs for Cylinder 3/Type A | ||||
| 10 | 53 | 04 | Misfire rate per 200 revs for Cylinder 4/Type A | ||||
| 10 | 53 | 05 | Misfire rate per 200 revs for Cylinder 5/Type A | ||||
| 10 | 53 | 06 | Misfire rate per 200 revs for Cylinder 6/Type A | ||||
| 10 | 53 | 07 | Misfire rate per 200 revs for Cylinder 7/Type A | ||||
| 10 | 53 | 08 | Misfire rate per 200 revs for Cylinder 8/Type A | ||||
| 10 | 53 | 09 | Misfire rate per 200 revs for Cylinder 9/Type A | ||||
| 10 | 53 | 0A | Misfire rate per 200 revs for Cylinder 10/Type A | ||||
| 10 | 54 | 00 | Highest misfire rate in 200 rev test/Type A | ||||
| 10 | 55 | 00 | Highest misfire rate in 1000 rev test/Type B | ||||
| 10 | 56 | 00 | Misfire monitor trip complete test | ||||
|
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The conversion is done as follows:
If the value is > 32767 then complement (change 0's to 1's and 1's to 0's), add 1 and a negative sign.
Example:
| 50000 = | 1100001101010000 |
| Complement of 50000 = | 0011110010101111 |
| +1 | |
| 0011110010110000 | |
| Signed Value = | -15536 |
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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.