Electronic Component Malfunctions. Chevrolet Tahoe

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1997 🢒 Tahoe - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Electronic Component Malfunctions

Component/System

Can Effect

•	Throttle Position Sensor (TP Sensor)

•	Accelerator Pedal Position Sensor

•	Erratic shift pattern

•	High or low line pressure

•	Rough engine

Engine Speed Sensor

TCC apply at the wrong time, or no apply

Automatic Transmission Input(Shaft) Speed Sensor Assembly

No TCC Apply

Automatic Transmission Output(Shaft) Speed Sensor Assembly (Vehicle Speed Sensor)

•	Erratic shift pattern

•	TCC apply at the wrong time

Pressure Control Solenoid Valve

•	High or low line pressure

•	Harsh or soft shift quality

Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve

•	TCC apply at the wrong time

•	TCC apply is harsh or soft

Automatic Transmission Fluid Pressure Manual Valve Position Switch Assembly

•	TCC will not apply

•	Will not shift into fourth gear

•	Harsh shift quality

•	High line pressure

Automatic Transmission Fluid Temperature Sensor Assembly

TCC control (on or off)

Engine Temperature Sensor

No TCC apply

Shift Solenoid Valves

Erratic gear applications:

•	Wrong gear

•	Only two gears

•	Does not shift

Four Wheel Drive Low Switch

Erratic shift pattern

Cruise Engaged

•	Delays in shifting into fourth gear

•	Delays in applying TCC

Torque Converter Clutch (TCC) Brake Switch

TCC does not apply