Question about 1994 Chevrolet Camaro
Hi Henning .
There are many more different conditions that can cause higher gears not engaging. The most common problem is a defective TPS (throttle position sensor.
The first step in troubleshooting is reading fault codes.
If the problem is an auto transmission not shifting correctly in 3rd and 4th, then, as said, most common faults are TPS sensor, TCM (transmission control module), Transmission shift solenoid etc.
If the transmission shift solenoids are clicking, then they are probably working. The complete test is done reading Ohms or Volts to find out if the solenoid is opening and closing the circuit.
Test the TPS.
The TPS is tested reading Volts on its wiring while pressing slowly and smoothly the accelerator pedal (or pulling the cable). If the Volts are not increasing smoothly, or if there are gaps in voltage reading, then the TPS is bad, the TCM (transmission control module) will not know that the throttle is opening fully, and will not shift to higher gears.
If the TPS is OK , then the TCM or the box itself may be the problem.
When problem is transmission-related you often get a P0700 error, that would mean that more codes are stored in a different module (TCM). The TCM can be scanned at the dealer or at an autorized garage.
Other codes (like P0500, vehicle speed sensor), will point directly at the faulty part that is causing trnsmission malfunction.
As mentioned, the TCM is the computer module controlling the transaxle, see: I get code p0700 after an OBDII scan.
There are many possible reasons for automatic transmission malfunctions. Most common transmission malfunctions are discussed here:My car does not shift..
If you want to do the code scanning by yourself, you will need to use an OBDII tool like this one:MaxiScan-MS409-OBD-II-Scanner/dp/B001LHW9YG" target="_blank" rel="nofollow">Autel MaxiScan MS409MaxiScan-MS409-OBD-II-Scanner/dp/B001LHW9YG" target="_blank" rel="nofollow"> OBD-II/EOBD ScanMaxiScan-MS409-OBD-II-Scanner/dp/B001LHW9YG" target="_blank" rel="nofollow">ner
If There are no OBDII codes, then the O/D codes can be scanned with a Com tool available at certified garage.
Test the TPS as first possible culprit.
Posted on Jul 05, 2010
you'll have to drop the transmission and replace it. You need to rebuild your tranny.
Let us know if you have something more to know else accept the suggestion.
Thank You for contacting Fixya.com
Posted on Jul 05, 2010
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Posted on Jan 02, 2017
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