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Home >> Land Rover >> 2002 >> Range Rover >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - With Codes >> Diagnostic Tests >> DTC P0130-P0138, P0140-P0141, P0150-P0158, P0160-P161, P1129, P1170 & P1173: Ho2S Circuit Malfunction >> Diagnostic Aids

Diagnostic Aids

  1. If DTC P0130, P0136, P0150 or P0156 is set, there is a circuit malfunction, caused by the stoichiometric ratio of suspect sensor is outside normal operating range.
  2. If DTC P0131, P0137, P0151 or P0157 is set, the sensor signal voltage is less than expected, caused by a sensor circuit short to ground.
  3. If DTC P0132, P0138, P0152 or P0158 is set, the sensor signal voltage is more than expected, caused by a sensor circuit short to battery voltage.
  4. If DTC P0133 or P0153 is set, the front sensor is aged, indicated by a slow responding sensor signal that is either too long or too short.
  5. If DTC P0134, P0140, P0154 or P0160 is set, no sensor activity is detected, caused by an open circuit.
  6. If DTC P0135, P0141, P0155 or P0161 is set, there is a sensor heater circuit malfunction, caused by an open or short circuit.
  7. If DTC P1129 is set, the front sensor connectors have been swapped side to side.
  8. If DTC P1170 or P1173 is set, there is a downstream fuel trim malfunction caused by a front sensor that is aged, indicated by a rear HO2S adaptation that is too lean or too rich.
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