Note. For circuit reference, see appropriate wiring diagram in WIRING DIAGRAMS article.
Circuit Description
Under certain operating conditions, front oxygen sensor (O2S) voltage should consistently fluctuate over 600 mV and under 300 mV. DTC P0130 will set if voltage does not fluctuate as specified for 50 seconds with TP sensor angle greater than 6 percent, engine running at normal operating temperature, and with system in closed loop fuel control.
Diagnostic Aids
Check for faulty or contaminated front O2S. Replace as necessary.