help solving problem code p1646
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Basic scanners can give misleading results with Jaguars but generic code lookups can be even more dangerous! Here is the Jaguar extract for P1646:
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/115720-help-solving-problem-code-p1646-p1646.jpg?amp;d=1437126154)
If the vehicle runs, you can reasonably ignore ECM failure as a possible cause and concentrate on the HO2 Sensor.
Graham
![](https://www.jaguarforums.com/forum/attachments/s-type-s-type-r-supercharged-v8-x200-15/115720-help-solving-problem-code-p1646-p1646.jpg?amp;d=1437126154)
If the vehicle runs, you can reasonably ignore ECM failure as a possible cause and concentrate on the HO2 Sensor.
Graham
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