633
UnclassifiedFuel
What This Code Means
DST displays TPS2 voltage of 4.8 volts or greater with the throttle closed; DST displays TPS2 voltage less than 0.2 volts; TPS2 voltage exceeds 4.8 volts
Possible Causes
- •TPS2 signal circuit shorted to voltage
- •Faulty ECM
- •Faulty Connection
- •Faulty Throttle
- •Open sensor ground circuit
- •Intermittent Problem
Suggested Actions
- 1Turn ignition OFF
- 2Disconnect Throttle Connector
- 3Turn ignition ON
- 4Slowly depress FP while observing TPS2 voltage
- 5For stationary applications: Go to DBW page and type desired throttle opening % in the FPP1 box to sweep throttle
- 6Probe sensor ground circuit on harness (ECM) side (bk/lt grn) with test light connected to battery voltage
Related General Motors Powertrain Fault Codes
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