04 Tahoe Whipple S/c REP after flashing

[h2.4]

Hello, I have a 04 Tahoe with Whipple S/c and every once and awhile it will go into REP mode right after flashing. I haven't had it do it during normal driving, but want to make sure. It is not exceeding its cylinder g's during a Wot pull either. But it randomly throws a p1518, Electronic throttle module to Pcm communication. I have raised the Maf cyl max values also. Wasn't sure if this happens randomly after flashing or not.

[Ben Charles]

It does happen after a flash.. but if a cylinder air mass is too high on this OS it can still trip there code and scaling the fueling fixes it!
So this is 2 different things

[h2.4]

So after about 10-12 ignition cycles from driving. The key on engine light was on, then started vehicle, and is in Rep mode. Code p1518. Vehicle is not exceeding the cylinder/g's either under full load. Anyone ever experience Rep with just keying on?

[blindsquirrel]

Important: Reprogramming the PCM may cause a communication error between the PCM and the TAC. If the PCM detects a communication error, DTC P1518 sets. Clear any DTCs from the memory that may have been set by Reprogramming.

? DTC P1518 sets if the battery voltage is low. If the customer's concern is slow cranking or no crank because battery voltage is low, ignore DTC P1518. Clear any DTCs from memory that may have set from the low battery voltage condition.
? DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. Inspect the fuses for the circuits that are in the TAC module harness--i.e. cruise, brake. An inspection of the fuses may lead you to the circuit that is shorted to the TAC module ground circuit.
? DTC P1518 sets if the TAC module ignition feed circuit is shorted to a B+ supply circuit. The TAC module stays powered-up when the ignition switch is turned OFF. When the ignition switch is turned ON, the TAC module is powered-up before the PCM. DTC P1518 sets because no communication is detected by the TAC module from the PCM. Inspect related circuits for being shorted to a B+ supply circuit.
? Inspect the TAC module power and ground circuits and the TAC module/PCM serial data circuits for intermittent connections.
? Inspect the TAC module connectors for signs of water intrusion. If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing.
? When the TAC module detects a problem within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing an individual condition may correct more than 1 DTC. Remember this if you review the stored information in Capture Info.
? For an intermittent condition, refer to Intermittent Conditions.

[Hondaeater]

Cool info.