2006 v8 vantage P1233 Fault code.

[akita1]

Afternoon all can anyone please throw some light on the above fault code the car was parked up in the garage last week all was well i went to start it yesterday and it just cranks I beleive the code points to a fuel related issue I have checked fuses etc but no joy the car is now stuck in the garage at the rear of my house with no way of getting it out for possible recovery could anyone recommend a mobile mechanic/diagnostic service that could possibly help in resolving this problem I am based inBexleyheath in Kent.Thanks in advance.

[Import]

Sadly I cannot help..but man that sucks..hope it’s an easy fix for you…

[skhannes]

This fault can be difficult to trace. Sometimes the obvious target fault is not the correct one. This is from an AM service bulletin. I have it in PDF but I do not know how to post just a PDF so this is a copy/paste.

P1233/P1235/P1237 - Fuel Pump Drive Module
P1233 - No FPM signal from the FPDM to PCMP
P1235 - No MFP signal from the PCM to FPDMP
P1237 - Pump or pump wiring fault
MIL status
Code P1233, P1235 will light the MIL, code P1237 will not
Fault analysis
Note: On the circuit diagrams, MPF is the pulse width modulated signal which drives the fuel
pump. FPM is the Fuel Pump Monitor diagnostic signal.
1. Connect AMDS and confirm that P1233/P1235/P1237 is logged. If any other faults are
logged, resolve these codes first.
Return to this procedure only if P1233/P1235/P1237 is logged again after clearing all
other codes.
2. P1233 - Install the PCM break-out box and disconnect the FPDM connector, C2203.
Carry out a continuity check between the PCM connector pin, C0635-21 (FPM) and FPDM
connector pin, C2203-4 (FPM).
If a wiring fault is detected, service the harness as necessary. Reconnect the FPDM
connector C2203, clear code P1233 and run a KOER test to ensure that the issue is
resolved.
If no wiring fault is detected, go to step 3.
3. Disconnect the FPDM connector C2203, switch on the ignition and check for +12 Volts
from FPDM connector pin C2203-5 (VIGN) to C2203-6 (GND).
If the supply Voltage is below 10.5 Volts, key off. Remove boot fuse F9. Check the fuse
continuity and replace if necessary.
Switch on the ignition. Check for the correct 12V ignition supply at the fuse input
terminal.
If the Voltage is below 10.5V, troubleshoot the Battery + supply through boot relay 2.
If the Voltage is in the range 10.5 - 13.5V, troubleshoot and repair the open circuit in
the 12V supply from F9 to connector pin C2203 (VIGN). Replace F9. Switch on the
ignition and clear the P1233 code. Repeat the KOER test to ensure that the issue is
resolved.
If +12v is present, replace the FPDM, clear code P1233 and run a KOER test to ensure
that the issue is resolved.
If the +12 Volt supply is not present, go to step 4.
4. Check the +12V ignition supply through the boot fusebox, from relay 2 and fuse F9 to
the FPD connector pin, C2203-5 (VIGN).
If a wiring fault is identified, service the harness as necessary. Reconnect the FPDM
harness, clear the P1233 code and run a KOER test to ensure that the issue is resolved.
5. P1235 - Install the PCM break-out box and disconnect the FPDM connector, C2203.
Carry out a continuity check between the PCM connector pin, C0635-12 (MFP) and FPDM
connector pin, C2203-3 (MFP).
If a wiring fault is detected, service the harness as necessary. Reconnect the FPDM
connector C2203, clear code P1235 and run a KOER test to ensure that the issue is
resolved.
If no wiring fault is detected, replace the FPDM Reconnect the FPDM connector C2203,
clear code P1235 and run a KOER test to ensure that the issue is resolved.
6. P1237 - Disconnect the FPDM connector, C2203 and carry out a continuity check across
pins, C2203-1 (PUMP +VE) and C2203-2 (PUMP -VE).
The pump motor resistance should be approximately 5 O ± 10%.
If the resistance reading is out of limits, access the evaporative loss flange and
disconnect the fuel tank connector, C0114. Repeat the pump motor resistance check
between pins C0114-3 and C0114-6.
If the resistance is within limits, do a continuity check between the following connector
pins:
C2203-1 (PUMP +VE) and connector C0114-3
C2203-2 (PUMP -VE) and connector C0114-6
If a wiring fault is identified, service the harness wiring as necessary, clear the P1237
code and run a KOER test to ensure that the issue is resolved.
If the resistance is out of limits, replace the fuel pump, clear the P1237 code and run a
KOER test to ensure that the issue is resolved.
7. If P1233/P123/P1237 is still present contact Aston Martin Technical Support.

[ian448]

Strange that it ran perfectly before been parked up, I would be looking at a imobilizer issue as even if the fuel pump had gone re the fault code the engine would still have fired and run for a few seconds.
I would disconnect the battery for half hour let everything run down and then reconnect, making sure the battery is fully charged.

[V8VS]

I understand that this can be tracker related as interrupts the ignition starting to fuel supply. This can be mapped out to eradicate the problem if you speak to Bamford Rose.

[skhannes]

A P1233 points to the fuel pump module. It is posted when the ECM either no longer sees the module (via voltage input) or the reported voltage is not plausible. It can be very complex based on the circuit AM designed where the module is integral.

I've known about two P1233 cases in this circa AM. The first one was caused by a broken earth (completely broken at the connector to the body). The second one was a nightmare that took weeks to find. After several failed attempts just replacing "stuff" the problem ended up to be a failing (intermittent) accelerator sensor. As odd as that sounds, the quirky design of the electrical circuit included the drive by wire circuit. The ECM only reported the fuel pump module even though there is a specific code for the drive by wire.

Personally, I wouldn't envy this project.

[akita1]

Hi a bit of an update had a really good car guy take a look with a pretty good diagnostic tool he is pretty sure its not fuel related he discovered that their is no spark and he also noticed that when cranking the rev counter is not moving he is going to do further checks later but thinks it may be the crankshaft position sensor has anyone else had this problem/symptoms that could possibly help Thank you.

[ian448]

Never known a crank sensor to suddenly fail completely they usualy fail over a period of time so you get some warning with rough running. I would still be looking at the imobilizer or tracker