theoneandonly
Established member
This is a little investigation i was part of for a non member (i only did the analysis) The actual leg work, data collection and spotting the chaffed wire done by @Fredastaire. It is included here to complement other P2200 threads, particularly because it refers to a sensor that does not exist on this model. Also confirmation of our diagnosis would help.
Previously the problem was resolved by replacing the precat temperature probe, which was identified by live data.
The vehicle is a 68 plate pickup. the van was taken for a run with my template 4 and gave the following graphs.
The graph does not show the characteristics of a shorting sensor.
Along with the DPFs temps the following concerned me
Basicaly the van had just finished a Regen but no reduction in particulates and no obvious sensor issues.
A discussion lead to the revalation that a previous run had only given straight lines.
Looking at that data gave the following.
My conclusion No +5V or 0V line to sensors and possibly intermittant. So start looking for chaffed wireing. Yes there are chaffed wires.
This is where a wiring diagram for the twin egr X290 would be handy. Any Ideas for sensor wire colours.
Previously the problem was resolved by replacing the precat temperature probe, which was identified by live data.
The vehicle is a 68 plate pickup. the van was taken for a run with my template 4 and gave the following graphs.
The graph does not show the characteristics of a shorting sensor.
Along with the DPFs temps the following concerned me
Particulate filter clogging | Distance from last DPF regeneration | |||
111.41 | 3.1 |
Basicaly the van had just finished a Regen but no reduction in particulates and no obvious sensor issues.
A discussion lead to the revalation that a previous run had only given straight lines.
Looking at that data gave the following.
My conclusion No +5V or 0V line to sensors and possibly intermittant. So start looking for chaffed wireing. Yes there are chaffed wires.
This is where a wiring diagram for the twin egr X290 would be handy. Any Ideas for sensor wire colours.
Last edited:
