LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2000 >> Sunfire L4-2.2L VIN 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Lean/Rich Transition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Lean/Rich Transition

Range 0-255 Counts
The PCM counts the number of times the Oxygen Sensor (O2S 1) goes from a low voltage (lean exhaust) to a high voltage (rich exhaust) within a 100 second period. Lean/Rich transition should increment when the vehicle is operating within the Conditions for Setting in DTC P0133 or DTC P1133.
scientia non olet · About LEMON Manuals