Recently replaced battery pack and brake accumulater {actuator?},engine warning light came on with "air conditioner connection needs to be checked"-took it back to mechanic and he checked "everything they touched" and said he did not know what the warning meant and he had never see it before. any ideas?? i took it to the dealer first and then to supposed prius expert place. myrandson wants to just get rid of it now but i am reluctant.
Its a/c here is a stander diagram of an a/c unit.
SOURCE: 2004 Prius Check Engine Light - code POA93
P0A93 is an inverter cooling problem. The inverter is cooled by a dedicated cooling system, which consists of an electric water pump, cooling fan, and radiator. This cooling system is independent of the engine cooling system.The mechanic should check if there is sufficient amount of coolant for the inverter, check if the coolant hose is not bent or clogged, if the water pump / cooling fan motor connections are ok, and of course if both of the cooling fan motors are OK.
P3108 is generally loosing communication with the A/C system control module. This can usually be solved by checking the wires and or the converter inverter assembly.
SOURCE: Prius series 1 (1998) warning sign
You will need to have this light reset with a scan tool, it is stored in a non-volatile (stays in memory with or without battery voltage) memory. Have the dealer check the cause, better than a tow bill.
SOURCE: 2005 Prius change in MPG after dealer service
What was the weight of the oil that was put into the engine when it was changed? Prius engines are VERY PICKY about the proper weight of the engine oil. Trust me. I see this quite often. The wrong weight oil can do bizzare things, and def lower your mileage. Something you can check: Take off the tube leading to the throttle body, and look down into the intake. Do you see any oil laying in the intake manifold? If so, you DEF have the wrong weight oil. This will NOT set a Check Engine light, either. Hope this helps.
SOURCE: right brake light out 2004 Prius
Th other post is incorrect, the 2004 has LED brake lights that are part of the tail light assembly. you have to replace the whole assy. There are two screws that hold the assy in, they are both covered by white cable clips. The clips just pull off and then you can use a 10mm wrench to remove the nuts on the screws. My brake light stopped working and during the removal, the LEDs started working again, hopefully you will find the same situation as the LEDs are supposed to last for years.
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