Fault code p1111+p1647 engin light is on - 2002 Jaguar X-Type

i think p1647 is a generic code that is not a problem code but a system check code put in each time the ignition is switched on and will always be present if you have no eml/other function light on then no worries hope this helps

i had my check engine light come on with the code p1111 it was a vacuum line.take the plastic engine cover off. it should be right on top where it says jaguar follow the a after the u to a hose somewhere in that hose either is split or has some kind of defect in it.either put some electrical tape around the hole or split.i just went out and put a new hose with hose clamps on it to fix that problem.check engine light went out after 2 days.i hope this is your problem.i don't know what code p1647 is yet.please post if this is the problem.

You can look up the code on www.bluejag.co.uk The problem is an O2 sensor (Bank 2 Upstream)and there are also details on the site about how to change it.
Fairly simple job

That P1647 fault code is for the upstream oxygen sensor on bank 2. This is the top sensor on the front exhaust cat converter. The usual failure is the sensor itself but you should inspect the harness that runs under and clipped to the battery tray. It is the sensor with the gray connector
Driveability will not be effected at the present, but it should be corrected in a timely manner to prevent damge to other componets, such as the catalytic converter.

Good luck, i hope this helps & thanks for using FixYa!

Fault Code:- P1647 Indicates a Power-train fault


The fault is generally due to a problem in the Computer & Output Circuit area


Fault Description: ECM HO2 Sensor control malfunction -bank 2 upstream (2/1)

Action of ECM:- ECM Default:- HO2S 2/1 control circuit inhibited


After clearing the DTC, complete the Drive vehicle for 10 minutes
Check for a reoccurrence of fault DTC.

Possible Fault:- HO2 Sensor 2/1 heater failure HO2 Sensor 2/1 sensing circuit: short circuit to ground, short circuit to high voltage, open circuit ECM Failure

Copied directly from a Jaguar forum:

P1111 is not a fault code. It is a special designator Jaguar uses meaning system ready, drive cycles completed after the last fault event. P1000, on the other hand, means system not ready, or drive cycles not completed after the last recorded fault event.

Some OBD II Basics - All P0xxx codes are generic and uniform across all manufacturers and mean the same on every car. All P1xxx codes are manufacturer specific codes. You cannot use a generic code chart to analyze P1xxx codes for a Jaguar.

Next time your car displays an engine fault light, try reading the codes then. If you have a CEL illuminated and the only code read is P1000 or P1111, then you probably have a fault that generic code readers cannot see. Could be a chassis code, for example.

One last thing - Neither P1000, nor P1111 can be erased.

Hope this helps you.

Hello! Code P1111 is pointing at a defective air temperature sensor.

Jaguar does not have a code P1647. However if the code was in the P164x area it is an effect not a cause; The air temp. sensor controls fuel flow by sensing a differential in temperature; This device is called a MAP. A small black component with two mounting bolt holes with an electrical connector. It cost around $80 if purchased at an auto parts store. Follow back from your air filter towards the intake (need to remove plastic engine cover) to locate the MAP.

If you need any additional information Please include it when you rate this solution.

Guru.................saailer


I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Code P1347 can be set for either a short to ground, short to power, high resistance or open circuit on Oxygen Sensor for bank 2, (HO2S21). Bank 2 is on your right when standing at the front of the engine facing the crank, and this sensor is the first in line; before the converters.
Code p1111 - Intake Air temperature (IAI) intermittent high voltage-low temperature condition.
Probable Cause:
1. Open circuit to IAI-Check connector
2. Failed IAI
3. Open Circuit Condition

Hope this helps

p1647 is linear o2 sensor control chip bank 2 p1111 is intake air temp sensor

go to auto zone and look in the repair manual and it has all the codes...