Inspection And Verification

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Verify the customer concern.
Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection

MECHANICAL	ELECTRICAL
Heated Oxygen Sensor (HO2S) incorrect installation Heated Oxygen Sensor (HO2S) contamination by incorrect fuel or oil Heated Oxygen Sensor (HO2S) degraded Exhaust system leakage Exhaust system restriction Air intake system leakage Mass air flow sensor contamination Incorrect fuel pressure Pipe detached or union leakage between intake manifold and cylinder head	Connector is disconnected, connector pin is backed out, connector pin corrosion Fuses Wiring harness Electrical connector(s)

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
Using the approved diagnostic tool, check for Diagnostic Trouble Codes (DTCs).
Refer to the DTC help text in Section 100-00 for diagnostic help specific to the logged DTC(s).

HEATED OXYGEN SENSOR (HO2S) ACTIVATION REQUIREMENTS

NOTE: If the sensor has not become active, then DTCs will not be logged.

The drive cycle required to activate all of the Heated Oxygen Sensor (HO2S) can vary greatly in time. This is dependent on all of the sensors reaching 'dew point' during previous drive cycles. 'Dew point' is where the moisture content in the exhaust has evaporated and can no longer damage the Heated Oxygen Sensor (HO2S). The closer a Heated Oxygen Sensor (HO2S) is to the engine, the faster it will achieve 'dew point'. Once a Heated Oxygen Sensor (HO2S) has reached 'dew point' the Heated Oxygen Sensor (HO2S) heating is activated and shortly afterwards the Heated Oxygen Sensor (HO2S) will be functional. Once functional the Heated Oxygen Sensor (HO2S) diagnostics become active and can report any error states with a DTC.