P1647 ECM HO2S Control Malfunction- B Bank
#1
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
#2
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
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
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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!
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!
#12
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.
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.
Last edited by trcns; 10-10-2013 at 11:42 AM.
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