Question about 1997 Pontiac Grand Prix
I have a code po121 on where is this located
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Posted on Jan 02, 2017
Change the throttle sensor first, and see if the map sensor is a victum. throttle sensor is similar to an old volume reostat, on some cars and everything else tries to do react, and everything errors out.... My bet is throttle position sensor... But you never know, it CAN be both, just usually not both.
Posted on Feb 18, 2011
Testimonial: "Thank you very much for the answer. We'll try the Throttle Position sensor first. That does make sense as to what is happening."
SOURCE: Getting the following codes from a 1997 Pontiac Grand Am....... PO121 TPS / Pedal Position Sensor A CKT Range / Perf Also, PO341 Camshaft Position Sensor A - Bank 1 CKT Range/Perf. Any thoughts on the
po121 means that there is a problem with the throttle position sensor ( tps). or in the wiring or connector, most likely its the tps that is bad. first remove connection from tps, heres how to test. use an ohms meter and hook a lead to top or bottom terminal of tps. use other probe on center terminal of tps. move throttle plate slowly, if the needle on meter does not move at a smooth pace, then tps is bad. good-luck!!
Posted on Oct 07, 2010
If its the same as my GTP, its just under the Supercharger right in the middle of the intake.
Just pull it out, its only held in with a O-ring. When you replace it, make sure you lube the gasket with grease so its easier to put back in, and less likely to nick the O-ring.
Posted on Apr 20, 2009
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