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 MANUALSCHEVROLET1996G 30 VAN V8-5.7L VIN RREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORTESTING AND INSPECTIONTHROTTLE POSITION (TPS) SENSOR
1996 Chevrolet G 30 Van V8-5.7L VIN R
Throttle Position (TPS) Sensor
1996 Chevrolet G 30 Van V8-5.7L VIN RSECTION Throttle Position (TPS) Sensor
When the VCM detects a malfunction with the Throttle Position (TP) sensor circuits, the following Diagnostic Trouble Code (DTC)s will set:
^ DTC P0121 circuit performance
^ DTC P0122 circuit low.
^ DTC P0123 circuit high.
^ DTC P1121 intermittent circuit high.
^ DTC P1122 intermittent circuit low.
Refer to Diagnostic Tables. Testing and Inspection
^ DTC P0121 circuit performance
^ DTC P0122 circuit low.
^ DTC P0123 circuit high.
^ DTC P1121 intermittent circuit high.
^ DTC P1122 intermittent circuit low.
Refer to Diagnostic Tables. Testing and Inspection
RENDER: 1.0x
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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.