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P1647 ECM HO2S Control Malfunction- B Bank

I have Jaguar XJ VDP, 2002 with 76000 miles, last month Istarted having Check engine light. I connected my computer and cleared theerror, few minutes later I got the error again, so I extracted the error.itsays “P1647 ECM HO2S Control Malfunction- B Bank”. Any suggestion what to do?

Please Help.

Thanks

Welcome to the forum trcns,

Good to have you here with us at Jaguar forums.

This particular DTC turns up here fairly regularly. The possible causes are:

1. HO2S heater failure
2. HO2S sensing circuit short circuit to ground or high voltage
3. HO2S sensing circuit open circuit
4. ECM failure

Most times it turns out to be the sensor on the way out.

Follow this link XJ ( X308 ) XJ8 / XJR - Jaguar Forums - Jaguar Enthusiasts Forum to the X308 forum for help, advice and information. The 'HOW TO' thread at the top is a good place to start for info on regular issues.

Please remember to add vehicle details to your Signature to help others to give relevant advice. Go to the User CP button on the left of the top menu bar, then Settings & Options under Your Control Panel. Select Edit Signature and enter the details.

You can also visit the US North East Region forum by following this link North East US - ME NH VT MA RI CT NJ NY PA - Jaguar Forums - Jaguar Enthusiasts Forum to find other members in your region.

Enjoy the forums.

Graham

Welcome to the forum trcns,

Good to have you with us.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.

https://www.jaguarforums.com/forum/a...ine=1355077469

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Thanks, I will appriciate a video on changing sensor.

Thanks all for welcoming me.

I bought two Oxygen upstream sensors yesterday. And although I have an account with AllData for my car, if someone has instructions/video on how to change these sensors I will really appreciate it.

It's kind of a pain if you don't have a lift and a helper but if you go for it take lots of pics!!!

+1

I've always ended up dropping the Cats off the manifolds because my hands just won't fit in the gap!

Graham

This weekend I replaced two O2 sensors from passenger side (Upper and Lower Sensor)of the car and I reset-ed the computer. But the error still is their. Was that bank One or Bank two?

Lolz, u did bank a

no offense on the lolz

look at the bright side, just do the other bank and no more oxygen sensor problems for u :D

well i decided to make a guide since this codes bug almost everyone:

jaghelp.com: P1646 and P1647 on your XJ

That way u have part numbers and a clear understanding of what is bank a and bank b. Best of luck!

It was easy to change Bank A sensors.

I don't know how to reach to Bank B sensors. I looked from under the car, feels like impossible to reach them. If some body changed O2's for bank B, upper and lower, please advise the best approach? Pictures will be great.