I've got a '97 Z, and these 3 codes keep popping up on the SES:
PO141
PO335
PO336

Searching online, I found out what the codes mean, but what do I need to do to fix these?

Thanks

 

The P0141 indicates a problem with the O2 sensor, on the driver's side, after the cat. Check the wiring, and you might swap the sensor from the passenger side and see if the code moves to that side.

PO335 indicates a problem with the Crankshaft Position Sensor circuit. Could be timing chain or opti problem.

Others will chime in with other things to check.

 

I'm going to guess that you meant to type P0336 for that last one. Also a crank position sensor problem, relating to an "out of range" duty cycle on the crank sensor signal. P0335 is for "low duty cycle (circuit failure)" according to my list.

I'd check for a signal from the CKP first.

 

Oops, yeah P0336.

I picked up a new O2 sensor, and a crankshaft sensor. Hopefully with will fix things.
Thanks guys!