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 G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 35 (ENGINE CONTROLS SELF-DIAGNOSTICS - 4.3L)DIAGNOSTIC TESTSDTC P0121: TP SENSOR PERFORMANCECONDITIONS FOR SETTING DTC
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Conditions For Setting DTC
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Conditions For Setting DTC
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- The TP sensor reading is more than a predicted value when the MAP is less than 43 kPa.
- The TP sensor reading is less than a predicted value when the MAP is more than 67 kPa.
- The above conditions are present for 1 second.
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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.