Celica Warning Light Gt St202

[SandShark]

have a JDM st202 3s-fe 1997 ,, engine warning light has just come on

error code is 52 knock,21 oxygen , the car was fine and had

sat for 3 months without moving, then suddenly the engine

warning light came on after having just started it...

so did replace the oxygen sensor but still same code , 52 is the first

error code so presume that its the knock sensor, but that I am still

looking for something that may have cuased this error as the car sat

for a while ....any suggestions on other things that I could try..

[GT4 BOOSTER]

try an ecu reset , it may just go away .

[Karma Supra]

Check the knock sensor wiring, 9/10 times faulty wiring causes this error!

[Ryan_Celica]

I have the exact same problem in my 96 celica, ive already replaced the o2 sensor jst gotta change the knock sensor bt i hav no idea where bouts on the engine it is? anyone knows wud appreciate the help