Code 22 - Automotive Wiring and Electrical


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Code 22

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Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

gatliff
User

May 31, 2006, 11:03 AM

Post #1 of 3 (1844 views)

Code 22	Sign In

my 93 Chevy C1500 truck 4.3 stall sometime when I come to a stop my check engine light give me a code 22 low voteage at the TPS I geting 4.33 V but when I ground my test meter at some other gound I get 5V can I run a new ground wire to the TPS without harming anything?

DanD
Veteran / Moderator
DanD profile image

May 31, 2006, 1:12 PM

Post #2 of 3 (1842 views)

Re: Code 22	Sign In

I don’t know if you’ll harm anything but you won’t accomplish anything either.
The sensor is grounded through the ECM (computer) and this ground circuit is shared with a few other sensors; so if the ground were bad you would be setting other codes along with the TPS.
You’ve got three wires at the TPS.
Gray: reference voltage from the ECM approximately 5Volt.
Black: sensor ground.
Dark blue: signal return.
At closed throttle you should have approximately .5 (1/2) of a volt and at wide-open throttle you should have approximately 4.5 volts on the signal return circuit.
During the transition from closed to wide-open throttle there should be an even consistent change in voltage in relation to how fast or slow you move the throttle.
Dan.

Canadian "EH"

gatliff
User

Jun 1, 2006, 7:47 AM

Post #3 of 3 (1838 views)

Re: Code 22	Sign In

Thank you I recheck the reading it only do this now and then when the motor is hot

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