Fuel/Ignition/Starting problem

SparkyNZ · 2021-09-12T04:09:34+00:00

Im sure @VolvoMike can help but to read codes and reset anything you need VIDA and Dice , the software and unit to plug into the OBD / CANbus network , can b...

nh2868

It's the FRONT or UPSTREAM oxygen sensors which adjust fuel trims - the ones closest to the engine. The rear ones just monitor whether your catalytic converters are still working - and they're a completely different fault code.

SparkyNZ

nh2868
It's the FRONT or UPSTREAM oxygen sensors which adjust fuel trims - the ones closest to the engine. The rear ones just monitor whether your catalytic converters are still working - and they're a completely different fault code.

Yeah I hear you. I could see big differences between the readings on the rear sensors but the same values on the front sensors that's all. Anyway the code disappeared again and it's been starting fine all day yesterday. Plugs looked clean.. see how it behaves over time.

nh2868

We've got Rich codes, Tim. Would a leaking purge valve give rich running ?

timbo

nh2868
We've got Rich codes, Tim. Would a leaking purge valve give rich running ?

Hi vacuum on a line to the fuel tank....it's possible

nh2868

Ok, learn something new every day ! Thanks Tim

martyG

2005 S40 2.4i @ 207,000km . I aquiered the car at 203,000km with no knowledge of its history.

I experienced an engine warning light 2 days back which turned out to be a DTC P0172 error. I was unable to clear it at first but figured it could be an error comming from the injector, MAF or O2 sensors. Put a dose of injector cleaner into the tank and after around 1 hour of running I was able to clear the error code and it has not returned.

My next 'preventative' step is to fit new plugs (no idea how old the existing are) remove and clean all 5 injectors and the upstream O2 sensor in carb cleaner in an ultrasonic bath. I have a new fuel rail sensor on order and that will go in at the same time. Just in case its a vacume leak I also have on order the snake like vacume hose that goes from the PCV to the manifold.

Should I replace the injector 'O' rings or not??

With luck the error will remain 'off' till I am ready to do the above.

ramrod

Not if they don’t need to be replaced

What is the actual problem you are experiencing?

martyG

ramrod
I experienced an engine warning light 2 days back which turned out to be a DTC P0172 error.

Given the car is 19 Yo and 207,000Km ( and I no nothing of its history prior to my purchase at 203,000Km) and I plan on keeping it for at least 10 years I figure if bits are getting old and I have the chance to clean/replace then that makes sense to do so - fyi I do all ny own work - except for machining if and when required.

Martyn

Ex850R

Rockauto is brilliant for a lot of parts if yo know exactly and its not RHD specific.

martyG

Ex850R
Do you know if the front axle assy are left or right hand specific?? S40 2005

martyG

Thanks for the tip. I am already sourcing parts from Rockauto and also FCP.

I have a OBD box that can read and also reset most codes - thats how I was able to identify the cause of the engine light. After I used the injector cleaner (into the fuel tank) and with about an hour of running the engine warning light went out and I was then able to clear the code as well.

Ex850R

martyG
No clue , you need a tech on here , FCP will be good to check or Rockauto may be clear about it.

nh2868

I bought a replacement genuine shaft from FCP for the T5 C30. The other shaft I rebuilt with a CV shaft kit from OEMDenied in QLD - specialise in Ford Focus RS but the shafts are the same as the T5 manuals...

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