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.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 181 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 2.2L)DIAGNOSTIC TESTSDTC P0125: ECT EXCESSIVE TIME TO ENTER CLOSED LOOPCONDITIONS FOR RUNNING DTC
1999 GMC Forward Control 5.7 R, Automatic
Conditions For Running DTC
1999 GMC Forward Control 5.7 R, AutomaticSECTION Conditions For Running DTC
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0171, P0172, P0201-P0204, P0300, P0301-P0304, P0326, P0327, P0336, P0420, P0440, P0442, P0446, P0452, P0453, P0480, P0481, P0502, P0503, P1133, P1171, or P1441 not set.
- Minimum air temperature is greater than 19°F (-7°C).
- Start-up ECT is less than 95°F (35°C).
- Engine run time is30 seconds and 30 minutes.
- Vehicle has traveled more than 0.5 mile (0.8 km) at more than 25 MPH (40 km/h).
- Calculated air flow is greater than 20 g/s.
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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.