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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (ENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - 3.1L ENGINE)DIAGNOSTIC TESTSDTC P0116: ECT SENSOR CIRCUIT PERFORMANCEDIAGNOSTIC AIDS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Diagnostic Aids
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Diagnostic Aids
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix, 2002 Chevrolet Malibu, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0116 is designed to detect an ECT sensor that is skewed high.
- An IAT sensor that is skewed low could cause this DTC to set.
- A skewed sensor is the problem. See appropriate SENSOR RESISTANCE table in appropriate SENSOR OPERATING RANGE CHARTS article.
- If engine has been allowed to sit overnight, the ECT and IAT temperature should be within the calculated amount.
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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.