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.
Conditions For Running DTC
DTCs P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0150, P0151, P0152, P0153, P0154, P0155, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P0412, P0418, P0506, P0507, P1133, and P1134 are not set.
Passive Tests
- The engine is running for more than 3 seconds.
- The engine speed is more than 600 RPM.
- The throttle is steady.
- The engine load is less than 80 percent.
- The system voltage is more than 10.5 volts.
- The Mass Air Flow (MAF) is less than 35 g/s.
- The air/fuel ratio is more than 12.5:1.
- The Engine Coolant Temperature (ECT) is between 41-227°F (5-108.5°C).
- The engine coolant start up temperature is between 41-176°F (5-80°C)
- The Intake Air Temperature (IAT) is between 41-162°F (5-72.5°C).
- The power enrichment or the Deceleration Fuel Cut-Off (DFCO) is not active.
Active Tests
- The engine is running.
- The engine speed is more than 600 RPM.
- The throttle is steady.
- The engine load is less than 80 percent.
- The system voltage is more than 10.5 volts.
- The MAF is less than 35 g/s.
- The fuel system is in Closed Loop operation.
- The Evaporative (EVAP) emissions purge is active.
- The ECT is more than 154°F (68°C).
- The vehicle speed is between 25-35 mph (56-72 km/h).
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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.