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.
No Trouble Code Complete Test
Check Technical Service Bulletins (TSBs) for any pertinent information. If a TSB exists, perform corrective action. If a TSB does not exist or if driveability problem still exists, perform tests NTC-2A through NTC-16A in sequence until driveability problem is found. See NO TROUBLE CODE TEST MENU table.
| Application | Test |
|---|---|
| Checking Secondary Ignition & Timing | TEST NTC-2A |
| Checking Fuel Pressure | TEST NTC-3A |
| Checking Coolant Sensor Calibration & Radiator Fan Operation | TEST NTC-4A |
| Checking TPS Calibration | TEST NTC-5A |
| Checking MAP Sensor Calibration | TEST NTC-6A |
| Checking Oxygen Sensor (O2S) Switching | TEST NTC-7A |
| Checking Oxygen Sensor (O2S) Heater | TEST NTC-8A |
| Checking Idle Air Control Motor | TEST NTC-9A |
| Checking Solenoid Operations | TEST NTC-10A |
| Checking Manual Valve Lever Position Switch (MVLPS) | TEST NTC-11A |
| Checking PCM Ground & Power Circuits | TEST NTC-12A |
| Checking EGR System | TEST NTC-13A |
| Checking Engine Vacuum | TEST NTC-14A |
| Checking Minimum Idle Airflow | TEST NTC-15A |
| Performing No Trouble Code Mechanical Test | TEST NTC-16A |
Use the Manual With the Right Hardware
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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.