new member needs advice

[Jeff Hambone]

Just purchased 1999 mazda B2500.check engine lite on. Code PO122
which says throttle pedal position sensor A circuit low input . What should I do to correct this?
4 cylinder engine .Also when shifting engine revs to 3500 rpm. I've replaced throttle position sensor, mass air , oxygen, intake air , and throttle body .( no change) .Still vevs 3500 rpm also while at steady speed feels like motor is surging. Thanks

 

[badmts]

Frankly,pay for diag and fix it yourself! GOOD DIAG may cost $100-$150 ,throwing parts at truck is not helping and adds to cost and frustration level

 

[NIPs]

ur problem is u are not recieving enough voltage either to the tps or to the computer my advice is either take it some1 or get a multimeter or a test light and follow the wires and checking the wires for bad connections or breaks, since u said u already replaced the tps, i would start right there with boot that connects to the sensor istself, its in a high heat environment and somewhat exposed to the elimates