P1236 code???

[SHOBrad]

I pulled the codes on a '99 SHO and got the following:

P1518 - I know what this is.

P1236 - Fuel pump control out of range.

Any ideas on what would cause this? I read that it is the same code as P1235 but P1236 won't set the ses light. Any idea of what to look for or if this truly is a problem? The car seems to show no symptoms at all.

Thanks,
Brad

 

[SHOZ123]

KB30 DTCs P0230, P1235 OR P1236: CHECK FPM PID TO SEE IF FAULT IS PRESENT NOW
Diagnostic Trouble Codes (DTCs) P0230, P1235 or P1236 indicate than an FP circuit (PCM Pin 80) fault has been detected. This is due to either an intermittent or hard fault. The only difference between the DTC P1235 and P1236 is that the P1235 is a MIL DTC.

Possible causes:

FP circuit open or short.
Damaged Fuel Pump Driver Module (FPDM).
Damaged PCM.
Note: If the FPDM does not receive a valid fuel pump command signal from the PCM on the FP circuit, the FPDM will go into FMEM and run the fuel pump at 100%. When this happens, the FPDM will also send a 25% duty cycle signal to the PCM on the Fuel Pump Monitor (FPM) circuit.