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 214 (ENGINE CONTROLS SELF-DIAGNOSTICS - 3.4L)DIAGNOSTIC TESTSDTC P0121: TP SENSOR PERFORMANCECONDITIONS FOR RUNNING
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Conditions For Running
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Conditions For Running
WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0107, P0108, P0122 or P0123 are not set.
- The engine is running for more than 2 minutes.
- The Engine Coolant Temperature (ECT) sensor parameter is more than 167°F (75°C).
- The MAP reading is less than 50 kPa for a TP sensor skewed high test.
- The MAP reading is more than 70 kPa for a TP sensor skewed low test.
- The MAP is steady for 5 seconds or more.
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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.