Driving it home and the battery light and park brake light came on. Gauges started flicking like the battery was going dead. lights dimmed to the point of terrifying and the check engine light came on. took it to a parts store, they hooked it up to a voltmeter and the voltage was very low. check engine code said system voltage too low. they had to jump start it so i could get home. airbag light came on. zero power. the person i bought it from (a mechanic) suggested it may be a loose wire and not the alternator. Any insight on this or as to WHAT wire it could be and how to diagnose?
The alternator is not charging
that can be from problem alternator , wiring ,fuse , voltage regulator, incorrectly adjusted alternator drive belt or dead battery
best have an accredited auto electrician check it out by bench testing the alternator and voltage regulator and load testing the battery
loose or dirty /corroded battery terminals will also be a part of the problem
if the voltage regulator is integrated with the ECM , you will need a replacement ECM
BUt get the proper diagnosis done first as that will save cash
SOURCE: 2002 Hyundai Accent lost power
the alternator can die out slowly you may have a bad wiring harness too but yes it can die out slowly
SOURCE: Engine light is blinking and it runs very rough/low power in gear.
Check the coil pack. Same symptoms on mine. It went at 74,000.
You can get the resistance specs from a shop manual. I have been told the plastic engine cover traps heat and makes short life of the coil pack. I removed the top engin cover, cosmetic only after replacing mine. You will probably need spark plugs also they are probably fowled by now. If you have not changed spark plug wires in awhile in would not hurt.
SOURCE: 2001 Hyundai Accent cranks, won't start
its the camshaft position sensor . Its located (atleast on my 1.6L) to the right of the front HOT plate the conection runs between the engine and the right side fan. easier to work on if you take off the air intake thats by the left front side of the battery. you will be working between the fan and the motor. only one bolt but is tricky so u need a 1/4 inch nuckle with a 1/4 extention. once located and you have the right tools it will only take 30 minutes to replace....dont forget to take off negative battery cable before you start.
SOURCE: Check Engine light flashing
Pull the code(s) at the moment the Check Engine light is flashing. Purchase an OBDII scanner (Auto Zone, Car Quest, O'Riely's, etc.) Be ready when it happens... do not shut off the engine ... plug the OBDII scanned into the DLC (Data Link Connector) and retrieve the code(s) at the moment it happens. If you still don't retrieve any codes when this happens, you have a malfunctioning ECM (Engine Control Module). Before you replace it (if this actually happens - no codes and Check Engine light is flashing), Disconnect both battery cables and touch them together for 30 seconds. Reconnect them to the battery and drive vehicle to see if it happens again (could be junk/corruption in ECM memory banks). If it happens again, the ECM is malfunctioning. REASONING: Whenever the "Check Engine" light comes on, there is ALWAYS a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). If no codes are retrieved, there's only one cause - ECM MALFUNCTION!
SOURCE: Replaced 0xygen sensor in 2003 Hyundai Accent 3 Times Not Fixed!
It sounds like you have either a lean or rich condition ocurring,could be exuast leak,vac leak,leaking fuel preasure regulator,cat convertor.At this point would go to dealer for diagnosis.
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