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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS SELF-DIAGNOSTICS - 6.5L)DIAGNOSTIC TESTSDTC P0126: INSUFFICIENT ECT FOR STABLE OPERATIONCODE ENABLE CRITERIA
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Code Enable Criteria
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Code Enable Criteria
WARNING: This page is about a different variant/trim than selected.
Conditions for running DTC:
- PCM performs this DTC diagnostic once per ignition cycle until a pass or fail condition exists.
- DTCs P0112, P0113, P0117 or P0118 are not set.
- Intake air temperature is greater than 20°F (-7°C).
- Total idle time since start up is less than 450 seconds.
- Engine operation time is more than 300 seconds.
Conditions for setting DTC:
- Fuel burned since start-up is more than 468,120-1,000,000 cu. mm.
- Engine coolant temperature is less than 133°F (56°C).
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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.