check engine light comes on after changing clutch? Options

[st202gt]

94 celica gt...well my engine light came on after we had finished changing my clutch... The speed sensor wire that attach to the transmassion was broken off and had to replace it with a used one that i got at the junk yard...first when i did the wire and disconnected the battery..the speed on the gauge didn't work, but the rpm work... i rewire up again and now it works....but the engine check light comes on as you start up the car... I tired to get rid of it. but it still comes on when you start the car...I think it the wire that is moving around to cause for that to happend or some other thing....I really need help or advice about this...because i need to smog my car in oct.

[Delta_Phoenix]

alright, here you go.

Check your battery voltage (should be greater than 11 volts), turn off all accessories, put your car in neutral, and make sure your car is at operating temperature.
Jump the terminals TE1 and E1of the "Data Link Connector 1" with a jumper wire (a paperclip will do).
Turn the ignition to "On" (but dont start the car)
Read the trouble code by watching the flashes of the check engine light
Sample Trouble Codes: These codes are for a 6th Gen. Celica...They may, however, be similar and/or carry over to other cars.

Code Blink Circuit
n/a 8 flashes normal
12 1, then 2 G, NE signal (#1)
13 1, then 3 G, NE signal (#2)
14
1, then 4 Ignition Signal Circuit
16 1, then 5 A/T Control Signal
21 2, then 1 Oxygen Sensor Signal
22 2, then 2 Engine coolent Temp Sensor Signal
24 2, then 4 Intake Air Temperature Sensor
25 2, then 5 Air/Fuel Ratio Lean Malfunction
26 2, then 6 Air/Fuel Ratio Rich Malfunction
27 2, then 7 Sub-Oxygen Sensor signal
31 3, then 1 MAP sensor
41 4, then 1 Throttle Position Sensor signal
42 4, then 2 Speed Sensor Signal
43 4, then 3 Starter Signal
51 5, then 1 Switch condition signal
52 5, then 2 Knock Sensor
71 7, then 1 EGR System