Question:
2000 Chevy Astro Warning Light.
Answers:
Why do mufflers leak a type of fluid out of it?
P0751 A/T 1-2 Shift Solenoid - No 1st or 4th Gear (4L80-E)Possible Causes
ATF is burnt or contaminated, or the level is incorrect
Transmission has an internal damage to the torque converter
Shift solenoid valve seals are damaged or leaking
Transmission has failed
Leaking master cylinder gasket.?
Setting Conditions
DTC P0122, P0123, P0502, P0503, P0740, P0742, P0753, P0758, P0785, P1810 and P1860 not set, engine started, engine running, vehicle driven to over 5 mph, Fuel Cutoff inactive, TP angle from 10-35% (± 7%), gear range or TFP manual valve position switch is D4 with no change for 6 seconds, TFT sensor from 68-266ºF, engine torque from 80-400 lb ft, and the PCM detected the commanded gear equaled 1st Gear and the ratio equaled 2nd Gear for more than 2 seconds; or the commanded gear equaled 4th Gear with the TCC locked and the ratio equaled 3rd Gear for more than 3.75 seconds.
This code sets in 1 Trip(s).
Transmission code - gear ratio problem. Could be a problem with a sensor.
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