Code 51 & 52
 

I'm getting code 51 & 52 and my car wont turn over. It has all power and it turned over and ran yesterday. please help.

Code 51?

Check your codes again

Code 52 is your knock sensors.

After you test your knock sensors to see if they are bad and replace which ever one is necessary or both, read up on this...

Knock Sensor Rewire

Code 51: Switch Signal

Diagnosis

• No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.

Trouble Area

• A/C switch circuit
• A/C switch
• A/C amplifier
• Throttle position sensor circuit
• Throttle position sensor
• ECU

http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx