P0503 OBD Trouble Code

1 result found

P0503 - GM
Type Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description

VSS Circuit Intermittent Input (4T60-E Transmission)
Cause

Engine speed above 500 rpm, not in P or N, more than 6 seconds have elapsed since last range selector position change, DFCO not active, OSS signal did not rise more than 500 rpm in 2 seconds, then the PCM detected that the OSS signal dropped more than 1500 rpm, condition met for 2 seconds.

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