P1502 fault code

[PPP]

Originally Posted by JFP in PA

P1502 is the code for end stage fuel pump relay, short to plus.

Three possible causes:
1. Bad relay
2. Wiring to relay shorted to B+
3. ECM faulty

Thanks for the reply.

I note what you say about the code being related to the fuel pump relay but that's not what the code reader is saying - it's saying it's a DVE spring test fail, which to me seems to fit with the click I get from the throttle body when the ignition is switched on. I have read that I should hear the motor running in the form of a hum while the TB is recognised and the settings updated, Despite that, I have changed the relay for a known good one so it isn't that component.

When you say the ECM, is that your term for what I would call the DME or ECU?

Can you advise regarding the spline nuts?

[redpepperracing]

Originally Posted by PPP

Can you advise regarding the spline nuts?

I just looked at mine and it is all held on with M10 nuts, so not sure what is up with yours. They are likely male Torx, from the way you describe them, I got a Torx kit on Amazon that has all the ones I've ever needed for working on the Boxster.

A picture would help us with identifying them.

[PPP]

Originally Posted by redpepperracing

I just looked at mine and it is all held on with M10 nuts, so not sure what is up with yours. They are likely male Torx, from the way you describe them, I got a Torx kit on Amazon that has all the ones I've ever needed for working on the Boxster.

A picture would help us with identifying them.

Here you go:

[redpepperracing]

Originally Posted by PPP

Here you go:

Those are obviously some kind of security nut, weird. Mine are just regular M10's:

[JFP in PA]

Originally Posted by PPP

Thanks for the reply.

I note what you say about the code being related to the fuel pump relay but that's not what the code reader is saying - it's saying it's a DVE spring test fail, which to me seems to fit with the click I get from the throttle body when the ignition is switched on. I have read that I should hear the motor running in the form of a hum while the TB is recognised and the settings updated, Despite that, I have changed the relay for a known good one so it isn't that component.

When you say the ECM, is that your term for what I would call the DME or ECU?

Can you advise regarding the spline nuts?

That information came directly from Porsche's OBD II diagnostic manual for your car, so it is correct.

Not surprised a non-Porsche specific diagnostic tool would give you incorrect information; we see that almost daily when customers come in telling use their car has this or that problem, and when we rescan the car with the proper tool, get something completely different. Unfortunately, with diagnostic tools, you gets what you pays for......

ECM=DME

[PPP]

Originally Posted by JFP in PA

That information came directly from Porsche's OBD II diagnostic manual for your car, so it is correct.

Not surprised a non-Porsche specific diagnostic tool would give you incorrect information; we see that almost daily when customers come in telling use their car has this or that problem, and when we rescan the car with the proper tool, get something completely different. Unfortunately, with diagnostic tools, you gets what you pays for......

ECM=DME

Yes I now see Porsche used that code for two different faults but the spring one my reader is reporting actually refers to the earlier cable throttle cars.

What would you recommend by way of a scanner or will I be into spending too much money for an amateur? I am using the icarsoft Porsche version.