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Trouble trifecta

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Old Dec 5, 2010 | 10:43 PM
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Default Trouble trifecta
Codes 121 tps volts don't match map
743 tcc solenoid/ circuit
1765 transmission 12v supply relay control circuit
I smell a pattern. Symptoms are shift between od and final drive gear at highway speeds. Any suggestions?
 
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Old Dec 6, 2010 | 02:24 AM
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I have seen the TPS mess with other sensors. TPS do go bad from time to time.
 
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Old Jan 10, 2011 | 07:49 PM
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replaced tps and iac fixed idle issues. still kickin in and out of final od at highway speeds??
 
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Old Jan 10, 2011 | 11:55 PM
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How is your fluid level? Is the CEL still on?
 
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Old Jan 11, 2011 | 12:17 AM
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just guessing here. look in the pdc box beside the battery and see if there is a relay for the trans. swap it with the horn or wiper and reset the pcm by disconnecting negative battery cable and turning on headlights for 30 sec.
 
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Old Jan 11, 2011 | 12:27 AM
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Originally Posted by dhvaughan
just guessing here. look in the pdc box beside the battery and see if there is a relay for the trans. swap it with the horn or wiper and reset the pcm by disconnecting negative battery cable and turning on headlights for 30 sec.
ill give that a try firstthing in the am
 
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Old Jan 11, 2011 | 12:28 AM
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Originally Posted by 03neonSE
How is your fluid level? Is the CEL still on?
fluids good........ cel????
 
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Old Jan 11, 2011 | 10:07 AM
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Check Engine Light.
 
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Old Jan 11, 2011 | 11:06 AM
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no cel ever....... just driving condition changed and as a result of course i checked the codes
 
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Old Jan 11, 2011 | 11:09 AM
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Is it actually downshifting, or is the TCC just dancing?
 
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