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You should go to www.reliable-store.com they have got books on every vehicle and also how to service/repair it,
service/repair/owner's/maintenance manual with
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Codes 24/25 are blend door motor codes indicating one or more blend doors are inoperative. Code 52 indicates there is a short circuit in the A/C solar radiation circuit
code 54 (DDC#( flashed ) refers to vehicle speed sensor fault
code 55 (DDC# flashed)refers to other ECU fault ( this fault is logged in conjunction with another fault to indicate missing information from another ECU. it also refers to J1939 data link fault
If the engine is at normal operating temperature 25 pounds is fine at idle. Also have you tested the oil pressure with a mechanical gauge, if not you should do so.
Wow!, I answered this about 30 minutes ago, but somehow my answer didn't post.
Fault code 420 is Catalyst system efficiency below threshold, ( bank 1 )
Fault code 430 is the same as above but, ( bank 2 )
Fault codes do not determine what part is bad, they just reduce the field for troubleshooting.
This is what I would have checked;
1. Oxygen sensor, upstream ( meaning before the catalytic converter )
2. Oxygen sensor, downstream ( meaning after the catalytic converter )
3. MAF, ( mass air flow ), sensor
4. Idle air control sensor.
This code means the Catalytic converter on bank 2 is not working efficiently. If your car is acting up with hesitation the Catalytic may be getting fouled by the way the engine is running. There may be another Code to read for the problem that caused the Catalytic converter to foul.
You have between 25 and 35 Startups before a Code is erased. Consider the Code 430 as the last Code recorded and the other Codes were beyond the 25 to 35 Startup limit.
You have several choices. (Autozone and Oreillys give free scans) There are fuel additives which claim to clean the fuel system and Catalytic converters. You can have the car put on a better machine at a Dealer to find the cause of the hesitation. BUT tell them you want the type of test for cylinder balance and timing issues, not just Code numbers.
Once you restore the engine to Specs, the Catalytic converter may clean itself over time.
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