Lambda Problem?

[everitj]

Just had the car back from the MOT and it's failed on emissions with a CO of 1.8. Last years MOT shows a reading of 0.01. I have checked the voltages at the ecu ( pins 4, 23 & 24 ) and don't seem to be getting anything on pin 24 at all. I have proved the wire from the ECU to the lambda plug (offside wheelarch). With a voltage of 0V is it safe to assume that lambda has failed or could somthing else cause this. Just thought I would check in here first before luffing out on new sensor....

Any help much appreciated as always.....

[Cider Andy]

On the basis of the checks you've run, I'd say the sensor is faulty. This should show up as a fault recorded in the ECU (code 44).

Try swapping the lambda sensors over. If the fault moves to the other side, you've found the problem.

[jsr]

everitj said:

Just had the car back from the MOT and it's failed on emissions with a CO of 1.8. Last years MOT shows a reading of 0.01. I have checked the voltages at the ecu ( pins 4, 23 & 24 ) and don't seem to be getting anything on pin 24 at all. I have proved the wire from the ECU to the lambda plug (offside wheelarch). With a voltage of 0V is it safe to assume that lambda has failed or could somthing else cause this. Just thought I would check in here first before luffing out on new sensor....

Any help much appreciated as always.....

Hi James,
Does sound like lambda sensor failure. Where in Essex are you? I have a fault code reader you can use if you want - i'm in Grays.

James

Edited by jsr on Sunday 18th March 09:03

[everitj]

jsr said:

everitj said:

Just had the car back from the MOT and it's failed on emissions with a CO of 1.8. Last years MOT shows a reading of 0.01. I have checked the voltages at the ecu ( pins 4, 23 & 24 ) and don't seem to be getting anything on pin 24 at all. I have proved the wire from the ECU to the lambda plug (offside wheelarch). With a voltage of 0V is it safe to assume that lambda has failed or could somthing else cause this. Just thought I would check in here first before luffing out on new sensor....

Any help much appreciated as always.....

Hi James,
Does sound like lambda sensor failure. Where in Essex are you? I have a fault code reader you can use if you want - i'm in Grays.

James

Edited by jsr on Sunday 18th March 09:03

Thanks JSR,

I've ordered a sensor this morning but I might take you up on your offer if this does not cure the problem...

J