code 21 keeps coming up at wot
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Joined: Oct 2001
Posts: 253
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From: Kissimmee,FL/Pennsauken,nj
Car: 85 z28
Engine: 305 TPI
Transmission: 700R4
code 21 keeps coming up at wot
this problem is in conjunction with all the other problmes ive had in previous posts,
any time i punch it at wot an when it shifts to 2nd gear the check eng. light comes on untill i let off the gas the the light goes off.
this is the 3rd tps that is on there, 1st one gave me a light, he 2nd did not give me a light, now this 1 gives me a light.
and its only at wot, when my tq loss accurs around 3000-4500
i think this is all in conjuction,with my tq and power loss.
any time i punch it at wot an when it shifts to 2nd gear the check eng. light comes on untill i let off the gas the the light goes off.
this is the 3rd tps that is on there, 1st one gave me a light, he 2nd did not give me a light, now this 1 gives me a light.
and its only at wot, when my tq loss accurs around 3000-4500
i think this is all in conjuction,with my tq and power loss.
-Ok... turn the ignition off and clear all codes
-then disconnect the sensor
-start engine and idle in neutral for one min. or untill SES light comes on.
-Turn the ignition to "on"(not start) with the engine off
-ground the terminal
--If you get code 22
-Probe the TPS sensor ground circut at the harness connector with test lights to 12 volts.
-If a light comes on its a faulty TPS connection or sensor
-IF the light is off, open sensor ground circut, faulty connection or faulty ecm.
-If you get code 21 check the connnector for a short to a voltage source or it could be a faulty ecm.
-then disconnect the sensor
-start engine and idle in neutral for one min. or untill SES light comes on.
-Turn the ignition to "on"(not start) with the engine off
-ground the terminal
--If you get code 22
-Probe the TPS sensor ground circut at the harness connector with test lights to 12 volts.
-If a light comes on its a faulty TPS connection or sensor
-IF the light is off, open sensor ground circut, faulty connection or faulty ecm.
-If you get code 21 check the connnector for a short to a voltage source or it could be a faulty ecm.
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mdtoren
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Aug 16, 2015 05:45 PM





