Hello all,

Two days ago my CEL light came on in the X-type. It was a few seconds after I started the car after work. There was no noticeable difference in driveability.

Today, I went to Advance Auto Parts to have them run a scan for the OBDII code(s). They came up with a P1647 but they did not have the DTC definition (stating what that code meant).

I looked up the code in JTIS and came up with this:

P1647 EMS
EOBD
ECM HO2 Sensor control
malfunction –
bank 2 upstream (2/1)
Drive vehicle for 10 minutes 2 N ECM Default:
– HO2S 2/1 control circuit
inhibited
— 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

Sounds like it is a O2 sensor failure of the heater element.

Looks like I will be replacing the O2 sensor on Bank 2, might as well do both while under the car. Any recommendations on O2 sensors?

I seen on Advanced Auto Parts website they have some from $58 - $358 -- OUCH!

 

P1647 is a nice easy one, you don't need to get underneath, it's situated right under the air filter box at the front of the engine on the manifold. I bought genuine Jag parts off ebay, I have heard the cheapy lambda sensors where you cut and join wires are not reliable at all.

 

Thank you for the heads up, I will look on ebay and over at jpam porsche jaguar as well. Appreciate the location of the sensor too!

 

Hello all,

I have noticed some driveability issues and wanted to know if the bad O2 sensor could be culprit.

The car is a 5spd and when in a higher gear (4th or 5th) and at 2200 rpm if the gas pedal is depressed as to pass someone the engine stumbles. I usually downshift to a lower gear and then the higher rpm does not result in the engine stumbling.

I also have an exhaust leak right aft of the flexible pipe before the pre-muffler or resonator. This may be causing some turbulence and back pressure issues the car is not designed to have with regard to engine tuning.

During this stumbling the exhaust will pop rapidly at the area of the leak. Car acts like it has a camshaft performance range of 4000-6000.

I figured with all the variable cam and intake tuning this would not result hence I question the bad O2 sensor and exhaust leak.
MPG is consistent at 25-27 highway and 22-24 in-town.
Any thoughts?