interesting CEL codes...anyone seen this combo

[azgolfrat]

Out for a drive yesterday and the CEL came on.
Kept driving :-)
Got out the X4 and read the codes...got the following

P1233 - fuel pump or FPDM problem
P0442 - small leak somewhere in the Evaporative Emissions

Gas cap is on & looks ok.
When building the car, I dropped the tank, put in a new pump, and reconfigured the wiring for the pump, FPDM, added voltage booster, & inertia shutoff. The power for the fuel pump comes directly from the battery with a dedicated line.

Wondering if anyone has gotten these two at the same time as I have.
Thanks

[musclemerc]

Out for a drive yesterday and the CEL came on.
Kept driving :-)
Got out the X4 and read the codes...got the following

P1233 - fuel pump or FPDM problem
P0442 - small leak somewhere in the Evaporative Emissions

Gas cap is on & looks ok.
When building the car, I dropped the tank, put in a new pump, and reconfigured the wiring for the pump, FPDM, added voltage booster, & inertia shutoff. The power for the fuel pump comes directly from the battery with a dedicated line.

Wondering if anyone has gotten these two at the same time as I have.
Thanks

You did all of this and still have a problem?

[8UWITH6]

Smoke test the tank, it probably needs a vent valve. Very common failure. Did you bypass or replace the factory FPDM?

[azgolfrat]

Smoke test the tank, it probably needs a vent valve. Very common failure. Did you bypass or replace the factory FPDM?

Thanks for the reply - no, the stock FDPM is still in the circuit, which was modified to accommodate the power line from the battery, the booster and the new fuel pump. A relay was also added so that the battery wouldn’t be drained when the car isn’t running


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[fastblackmerc]

Always fix the 1st code as it usually cause additional codes.

[8UWITH6]

Always fix the 1st code as it usually cause additional codes.

This is sometimes correct. However, in this case it has a code for the evaporative emission system and the fuel system. More than likely there are two issues. But, I get what you are saying FBM.

OP, I would double check the wiring that was modified on your FPDM, monitor fuel pressure somehow and make sure it is in spec.

[blazen71]

This is what Google says about P1233 code. I would look at your wiring and connections.

"The Powertrain Control Module (PCM (https://www.autocodes.com/articles/11/what-is-pcm.html)) monitors the Fuel Pump Monitor (FPM) circuit from the Fuel Pump Driver Module (FPDM). With the key on, the FPDM continuously sends a duty cycle signal to the PCM (https://www.autocodes.com/articles/11/what-is-pcm.html) through the FPM circuit. The test fails if the PCM (https://www.autocodes.com/articles/11/what-is-pcm.html) stops receiving the duty cycle signal."

[musclemerc]

This is sometimes correct. However, in this case it has a code for the evaporative emission system and the fuel system. More than likely there are two issues. But, I get what you are saying FBM.

OP, I would double check the wiring that was modified on your FPDM, monitor fuel pressure somehow and make sure it is in spec.

Best advise ever.

[azgolfrat]

Blazen
FBM
8UWITH6 (love it)
Thanks for the helpful suggestions.

[blazen71]

Who modified your FPDM? Black306? http://www.black306.com/?page_id=13

[azgolfrat]

Who modified your FPDM? Black306? http://www.black306.com/?page_id=13

Blazen,
Not modifed… still has stock FPDM in


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