Power Solutions International

154

UnclassifiedElectrical

What This Code Means

HO2S voltage fixed between 0.4 and 0.6 volts; Resistance >= 5 ohms from ECM header to HO2S signal at sensor connector; Resistance >= 5 ohms from HO2S signal return at sensor connector to Analog Return at the ECM header; Resistance >= 5 ohms from ECM header to HO2S heater low side circuit; Resistance >= 5 ohms from HO2S heater high side to power relay; HEGO impedance feedback not within +/- 50 ohms of target

Possible Causes

  • •High resistance in wiring harness
  • •Faulty HO2S sensor
  • •Faulty wiring harness

Suggested Actions

  1. 1Perform On-Board (OBD) Sys-Check
  2. 2Repair wiring harness and retest
  3. 3Replace HO2S Sensor and retest

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