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I did the auto off thing to check error codes for my Acc and the results i got were: 1...21, 2...18, 2...21. Please help. I know my climate control system is a mess... I cant figure this out.
 

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If I remember correctly these are the stepper motors/blend door.

Have you done the diagnostic a few times? Got a 21 or 13 code for about half an hour. Did about 5/6 diagnostic runs, then it cleared itself.
 

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Press Auto and Off to view codes. Below is a list of what the codes stand for: GOOD LUCK

01 ACC internal fault
02 cabin temp sensor
03 solar sensor
04 left mixed air temp sensor
05 right mixed air temp sensor
06 left blend door
07 left blend door
08 left blend door
09 right blend door
10 right blend door
11 right blend door
12 air distribution motor
13 air distribution motor
14 air distribution motor
18 heater valve solenoid
19 heater circulation pump
20 control circuit blower check fan control
21 Recalculate motor
22 Reflash per SB 271-2206
23 control module sensor ground missing​
 
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