Hi.
There are several things to check.
1) Check transmission fluid level.
2) Make sure that transmission is not in limp mode. That will restrict use of transmission to low gears. Go to the nearest car dealer and do a code scanning.If there are codes stored troubleshoot the codes.
3) Check if brake lights are working. Check brakes switch. The transmission shift lock may be on.
4) Check the TPS. The throttle position sensor is located on the throttle body
The
sensor detects the opening of the throttle, its output is used by
the transmission control module to determine when to shift gears. The
TPS is basically a variable resistor mounted on the throttle body. The
TPS is tested by reading volts while operating the pedal. Making sure
that voltage is in range and that there are no gaps or spikes in voltage
changing while the pedal gets pressed slowly and smoothly.5) Test the transmission switch solenoids. The higher gears solenoids may be defective. The solenoids are part of a pack located on the valve body in the transmission. The solenoids are tested reading Ohms at their terminal.
6) If you do not find anything else check wiring to transmission control module located under the dash. Make sure you did a code scanning.
7) Look for mechanical problems (clutch, valve, gears) inside the transmission.
On automatic transmission problems see also:
My car does not shift..Regards.
Ginko
Ginko.
This is a 42LE trans and the solenoid pack is inside on top of the valve body. It is not common for these to fail. If the car is in Limp In Mode, you'll have 2nd gear only. If this is the case, the TCM will give you a code and you can diagnose from there. What codes do you have and what are your CVIs?
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