P1647 & P1648 error codes
#1
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My car has been slightly miss fireing and I have today changed the air flow sensor and although the car is running better i still have a slight misfire in lower gears, i cleared the error codes but after a 10 min drive i re -tested, and the codes P1646 and P1647 where back.
The codes are Linear 02 Sensor Control Chip Bank 1, and Bank 2?
I believe these to be sensor on the excaust system bank 1 (Passenger side) and Bank 2 (drivers side)?
Surely both have not gone at the same time? Hence why i have changed the Air flow meter as the only thing i can think off that would cause this is a lean engine air/fuel mixture?
can anyone give me guidence on what to check next?
The codes are Linear 02 Sensor Control Chip Bank 1, and Bank 2?
I believe these to be sensor on the excaust system bank 1 (Passenger side) and Bank 2 (drivers side)?
Surely both have not gone at the same time? Hence why i have changed the Air flow meter as the only thing i can think off that would cause this is a lean engine air/fuel mixture?
can anyone give me guidence on what to check next?
#2
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Those codes are for the lamda sensor heater circuit according to JTIS. That would indicate either some ECU problem (hope not!), ground circuit (inspect where th sensor ground connects) , or MAYBE a blown fuse in the heater circuit.
Post the MY and model, and I will look up which fuses to look at.
Post the MY and model, and I will look up which fuses to look at.
#3
#4
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I dunno. Those are pretty specific code to the heater control circuit and the implication is that they are generated by the ECU based on current flow.
Do you have a CEL? Did you reset the codes with the scanner? By disconnecting the battery?
In any case, good luck and repor back how it comes out.
Do you have a CEL? Did you reset the codes with the scanner? By disconnecting the battery?
In any case, good luck and repor back how it comes out.
Last edited by sparkenzap; 09-03-2009 at 05:53 AM.
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