I have a 97 legacy that is throwing p122(tps) p303(cylinder 3 misfire) p325(knock sensor). I replaced the tps, spark plugs, plug wires, #3 injector and still throwing all 3 codes and no improvement. 230,000 running ruf, lacks power, shimmy. figured the knock sensor was due to p303 but i cant seem to determine what the cause of p303, also why am i still throwing p122 after the tps has been replaced. any ideas or suggestions would be greatly appreciated thanks for looking. im running out of money for parts and don't know what to check next.

P0325 is a knock sensor circuit malfunction. It's almost always due to failure of the knock sensor or its wiring connections.

 

EDIT: Both the TPS and knock sensor wiring to the ECU go through connector pair E2/B21 (large 12-pin) at the rear passenger side of the engine. If there's some corrosion or the connectors aren't properly mated, it might cause both codes.

Edited April 7, 201015 yr by OB99W