Toyota Repair: 97 V6 Camry diagnostic codes, negative battery cable, excessive noise

Question
How do I get a list of all the codes ? Other than that, what are codes 52 and 55 ??
 Cheers

Answer
Those codes are for the knock sensors, these are located in the engine block one for each side under the intake manifold, sometimes the wiring to the sensors can also be damaged, the best way is to remove the intake manifold and replace the sensors incliding the wiring subharness. If the engine has other problems like misfiring or excessive noise it can also cause the sensors to set a computer code, try resetting the light by disconnecting the negative battery cable for a minute and then see if the light comes back, if it comes back instantly after the engine startr there is an open circuit, if it takes a while to come back there is another problem and replacing the sensors and wiring harness may be needed.