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 MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 28 (ENGINE CONTROL SYSTEM - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0120: TP SENSOR CIRCUITTEST DESCRIPTION
2006 Chevrolet Suburban C1500, 5.3 Z
Test Description
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Test Description
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers in the diagnostic procedures.
- 1 - The Diagnostic System Check - Engine Controls prompts the technician to complete some basic checks and store freeze frame data on the scan tool, if applicable. This creates an electronic copy of data taken when the fault occurred. The information is then stored in scan tool for later reference.
- 2 - This step determines if DTC P0120 is the result of a hard failure or an intermittent condition.
- 7 - When the 5-volt reference is jumpered to TP input circuit, scan tool parameter should read 99 percent.
- 8 - When TP sensor input circuit is jumpered to battery voltage, scan tool parameter should read 99 percent.
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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.