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07 Avalanche - TechMate Code 81 Throttle Actualtor Control Fault
jimzonaboat posted a topic in Centurion Boat Maintenance, Performance, Troubleshooting
Last trip of the season my Avalanche went into power reduction mode. I was cruising around and then backed off the throttle at which point I got the buzzer every minute and no throttle. I turned the boat and batteries off for about a minute and then back on and the throttle operated normally for the rest of the day. My engine information is: Year: 2006 Make: PCM Excalibur 330 Model: 15-570V-01 (5.7L 350 CID LH MPI) (GM) Serial #: 462755 Firing Order: 18436572 Manuf: 6/21/2006 I went ahead and bit the bullet and got the TechMate Scan tool from Rinda Technologies to see what was going on under the hood. This is the information it provided: Code 81 Throttle Actuator Control (TAC) Fault TAC Error, PPS 1&2 Correlation Fault TAC Error, Limited Authority In the PCM Digital Throttle Control Diagnostic Supplement (attached if anyone needs it) it lists a variety of combinations, but this exact combination isn't mentioned. Anyone experience this and what the fix was? This happened last year as well and the shop replaced the Throttle Position Sensor on the Throttle Body. Digital Throtle Control Supplement.pdf