P1647, Any Help it's not the O2 Sensor

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09-27-2007, 07:16 AM

alltune33409

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P1647, Any Help it's not the O2 Sensor

2002 Jaguar X-Type 3.0

Have a recurring P1647. Changed O2 Sensor 2 Bank 1 and still recurring. Any help would be appreciated.

Tony

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09-27-2007, 10:44 AM

Max

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RE: P1647, Any Help it's not the O2 Sensor

Here are the other two options for the P1647 code.

The HO2 sensor 2/1 sensing circuit: short circuit to ground, short circuit to high voltage, open circuit.

ECM failure.

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09-27-2007, 05:17 PM

alltune33409

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RE: P1647, Any Help it's not the O2 Sensor

Max,

Any help on testing for the short would be helpful.

Tony

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09-27-2007, 09:32 PM

Max

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RE: P1647, Any Help it's not the O2 Sensor

So far I have been unable to find the testing info in the JTIS. Hopefully someone else can help out.

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09-29-2007, 10:26 AM

Max

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RE: P1647, Any Help it's not the O2 Sensor

Tony,

H/W is the answer from a tech as to checking the HO2 sensor.

Quote:

As the O2 sensors have been changed, next step is to test the connection to the ECM (he should measure the wire impedance*), and if this is ok, then I'm afraid the ECM may have a problem, which is rare but happens some times...

*Don't know precisely the wire impedance, but there's no need to finely analyse the values: it's just to see if the signal can be distorted by a problem on the cable or if the cable is ok.

Hope this helps....

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01-23-2009, 11:59 AM

1pauljames

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RE: P1647, Any Help it's not the O2 Sensor

Ey up,
I have P1646 fault which is sensor 2 bank 1 so you may have changed the wrong sensor if yours is P1647 ?
(Linear O2 sensor control chip for bank 1 was other fault which was caused by same faulty sensor).
Good luck with it.

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