someone has to know something!
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Re: someone has to know something! (vettedreams)
Code 21 sets if the throttle position sensor voltage exceeds 2.5 volts if:
engine running, air flow less than 15 Gm/sec, 3 seconds gone by, or, TPS output over 4.5 volts with ignition "on". Code 22 sets if the TPS voltage is less than 0.2 volts. You can read the TPS voltage with a scan tool, or with a voltmeter , ign on, engine not running. With the throttle closed, the TPS voltage should be less than 0.62 volts or the TPS needs adjustment. WOT should produce close to 5.0 volts. As you advance the throttle, the TPS voltage should also advance smoothly to maximum. If the TPS check ok, then you may have an intermittent with the three wires that go to the ECM from the TPS. Good Luck.
engine running, air flow less than 15 Gm/sec, 3 seconds gone by, or, TPS output over 4.5 volts with ignition "on". Code 22 sets if the TPS voltage is less than 0.2 volts. You can read the TPS voltage with a scan tool, or with a voltmeter , ign on, engine not running. With the throttle closed, the TPS voltage should be less than 0.62 volts or the TPS needs adjustment. WOT should produce close to 5.0 volts. As you advance the throttle, the TPS voltage should also advance smoothly to maximum. If the TPS check ok, then you may have an intermittent with the three wires that go to the ECM from the TPS. Good Luck.
