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Multiple Fault Codes

HDJ

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Just plugged in my obd2 elm 327 scanner and car has come up with the following codes no check eng light. Car drives and shifts fine etc. Anyone know what’s going on?

Only got the car a month and a half ago and no issues when driving, codes can be cleared but come back within a few days. No check engine light however. Still have 1.5 months left of my used car stat warranty.
 

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stooge

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a lot of it looks like communication errors so i would start with getting the battery checked/tested.
low voltage can cause coms errors and invalid data which causes all sorts of errors to pop up.
 

HDJ

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a lot of it looks like communication errors so i would start with getting the battery checked/tested.
low voltage can cause coms errors and invalid data which causes all sorts of errors to pop up.
using the menu system from the car battery is at 12.6 volts with ignition on.
 

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You seem to have TCM and ABS modules communication faults. These faults can be caused by faulty modules but they may not be the modules identified by the DTC... There can be a multitude of reasons for these faults and a really clear head and methodical diagnostics process is needed to be able to correctly identify the culprit and fix it.

Diagnose Dan has a youtube channel that goes into lots of examples of complex problems that other shops seem to have difficulty repairing. He walks the viewer through the diagnosis process and solves the issues that others can't/


DD has lots of CAN bus examples including one BMW(?) that had someone do some mechanical work on it and not clip the wiring loom back into its holder so the loom touched the exhaust which melted the insulation resulting in intermittent shorts and thus problems.. Unfortunately the loom contained the CAN bus wires which were the melted ones and there were all sorts of communication and module faults being reported as a result. There was another car which would not start due to a faulty door handle.... In all these examples, faults resulted in CAN bus communication issues which for many seem to be too complex to handle and those less skilled technicians simple do a parts replacement strategy until they clumsily arrive at a solution (very costly way to diagnose).

What's obvious in fault finding is that you need to have access to wiring diagrams for all relevant nodules within your vehicle and know what is connected to what with what colored wires (if you are to have a chance at resolving things....

So, look at Diagnose Dan's channel and watch some of the CAN buss videos... Then you may have more chance in finding a mechanic that knows what they are doing.

Also don't dismiss stooge's suggestion as battery could be a cause... So fully charge your battery and then load test it (free @ supercheap?). This should quickly and cheaply rule out low voltage battery issues as being a cause.

PS: here's the door handle no start video... the headbanging can start after seeing the videos :p


and a now start when hot video


but there are many more that may help one understand teh complexitries of such fault diagnosis :oops:

And lastly, here's a CAN bus fault video

 
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HDJ

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You seem to have TCM and ABS modules communication faults. These faults can be caused by faulty modules but they may not be the modules identified by the DTC... There can be a multitude of reasons for these faults and a really clear head and methodical diagnostics process is needed to be able to correctly identify the culprit and fix it.

Diagnose Dan has a youtube channel that goes into lots of examples of complex problems that other shops seem to have difficulty repairing. He walks the viewer through the diagnosis process and solves the issues that others can't/


DD has lots of CAN bus examples including one BMW(?) that had someone do some mechanical work on it and not clip the wiring loom back into its holder so the loom touched the exhaust which melted the insulation resulting in intermittent shorts and thus problems.. Unfortunately the loom contained the CAN bus wires which were the melted ones and there were all sorts of communication and module faults being reported as a result. There was another car which would not start due to a faulty door handle.... In all these examples, faults resulted in CAN bus communication issues which for many seem to be too complex to handle and those less skilled technicians simple do a parts replacement strategy until they clumsily arrive at a solution (very costly way to diagnose).

What's obvious in fault finding is that you need to have access to wiring diagrams for all relevant nodules within your vehicle and know what is connected to what with what colored wires (if you are to have a chance at resolving things....

So, look at Diagnose Dan's channel and watch some of the CAN buss videos... Then you may have more chance in finding a mechanic that knows what they are doing.

Also don't dismiss stooge's suggestion as battery could be a cause... So fully charge your battery and then load test it (free @ supercheap?). This should quickly and cheaply rule out low voltage battery issues as being a cause.

PS: here's the door handle no start video... the headbanging can start after seeing the videos :p


and a now start when hot video


but there are many more that may help one understand teh complexitries of such fault diagnosis :oops:
would this be covered under used car stat warranty?
 

Skylarking

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would this be covered under used car stat warranty?
Yes... as a defect, it must be covered by the used car stat warranty unless specifically documented as a defect on the sales contract.

So go get the seller to fix it :p
 
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HDJ

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Yes... as a defect, it must be covered by the used car stat warranty unless specifically documented as a defect on the sales contract.

So go get the seller to fix it :p
Ok thank you. Hopefully don’t get too much of a run around from Sutton’s Holden.
 

stooge

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using the menu system from the car battery is at 12.6 volts with ignition on.

looking at the volts really shows you nothing, a battery can show 12.6v and still be failing because when you put it under load it fails to provide enough power to keep everything happy.
most of the time the error codes will popup when you start the vehicle because that puts a fair load on the system.

if you purchased the vehicle secondhand then you do not know how the battery has been looked after and it could have sat on the lot flat for some time which kills batteries.
goto a battery world or something and ask them to load test it or just replace it with a new one if it was a secondhand purchase for peace of mind.


also make sure your obd app is not caching those errors and showing them from the appcache because some of the apps do cache the errors and confuse people into thinking those errors are still in the vehicle when they are not.
 
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HDJ

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looking at the volts really shows you nothing, a battery can show 12.6v and still be failing because when you put it under load it fails to provide enough power to keep everything happy.
most of the time the error codes will popup when you start the vehicle because that puts a fair load on the system.

if you purchased the vehicle secondhand then you do not know how the battery has been looked after and it could have sat on the lot flat for some time which kills batteries.
goto a battery world or something and ask them to load test it or just replace it with a new one if it was a secondhand purchase for peace of mind.


also make sure your obd app is not caching those errors and showing them from the appcache because some of the apps do cache the errors and confuse people into thinking those errors are still in the vehicle when they are not.
Bit of an update battery and alternator have passed the load test. Made sure to take it to two seperate businesses and both confirmed that alternator and battery are fine. Dealership has advised me to clear codes and keep scanning everyday to see if they come back. It’s been one day so far and car has travelled a total of 60 kilometres and nothing has shown up so far.
 

HDJ

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U0100 has returned. But no check eng light this is very strange hmm.
 
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