Visual Inspection

WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. 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.
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 relevent DTC index for diagnostic help specific to the logged DTC(s).

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)