Injector cyl#1 Open Circuit [P0201].........................

[MrCredit]

Hooked up the laptop to the ECU as the car isn't starting and the software is reporting:

Injector cyl#1 Open Circuit [P0201]
Injector cyl#2 Open Circuit [P0202]
Injector cyl#3 Open Circuit [P0203]
Injector cyl#4 Open Circuit [P0204]
Injector cyl#5 Open Circuit [P0205]
Injector cyl#6 Open Circuit [P0206]


I've checked the engine harness and all connectors look good.
Can't believe all 6 injectors would die at the same time?

Anyone else ever had anything like this?
I'm worried that it might be a problem with the ECU itself.

[Adrian W]

MrCredit said:

Hooked up the laptop to the ECU as the car isn't starting and the software is reporting:

Injector cyl#1 Open Circuit [P0201]
Injector cyl#2 Open Circuit [P0202]
Injector cyl#3 Open Circuit [P0203]
Injector cyl#4 Open Circuit [P0204]
Injector cyl#5 Open Circuit [P0205]
Injector cyl#6 Open Circuit [P0206]


I've checked the engine harness and all connectors look good.
Can't believe all 6 injectors would die at the same time?

Anyone else ever had anything like this?
I'm worried that it might be a problem with the ECU itself.

Thier switched negative, so check the live feed hasnt fallen off.

[GreenV8S]

Sounds like a possible blown fuse in the injector +ve supply, or a wiring fault. If the injectors are batch fired it's possible that you have a fault on the earth side but the fact it's reporting a separate fault for each injector makes it seem unlikely. Just as a sanity check, with everything off you could pull the plug off one of the injectors and measure the resistance between the terminals. Assuming they're the usual high impedance injectors you should seem something around 15 Ohms across each injector.

[Adrian W]

GreenV8S said:

Sounds like a possible blown fuse in the injector +ve supply, or a wiring fault. If the injectors are batch fired it's possible that you have a fault on the earth side but the fact it's reporting a separate fault for each injector makes it seem unlikely. Just as a sanity check, with everything off you could pull the plug off one of the injectors and measure the resistance between the terminals. Assuming they're the usual high impedance injectors you should seem something around 15 Ohms across each injector.

Injectors are under the inlet manifold, but ecu loom which covers injectors, coils,tb, air temp, mass and boost, cam, crank and lambda sensors all exit on the drivers side of the engine and then go straight to the ecu. and relay block. before you go too far give everything a good wiggle just in case something has come loose a short could pull the +12 supply down.

[RobP]

Nah... I reckon it's the low pressure fuel hose gone floppy (!)

[Adrian W]

RobP said:

Nah... I reckon it's the low pressure fuel hose gone floppy (!)

nah its cos its a blue one, you coming to Donington?

[MrCredit]

Adrian W said:

nah its cos its a blue one

I best get a respray then!!

Which colour works the best?

[RobP]

Adrian W said:

RobP said:

Nah... I reckon it's the low pressure fuel hose gone floppy (!)

nah its cos its a blue one, you coming to Donington?

Yep..and to answer MrCredit's question...titanium.

[Jenx]

MrCredit said:

Which colour works the best?

That'll be this one then

Edited by Jenx on Thursday 30th October 06:25

[MrCredit]

Well the mystery is solved

Turns out one of the 12v feeds to the ECU harness, #7 on RR03, was not quite 12v!!

Looks like it was dodgy connection in the rear fusebox.

Sorted it and now she starts and runs fine.

Thanks for the advice guys.

[Adrian W]

no problem