Question about 2000 Hyundai Sonata

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Code u00009 onboard computer,

My hyundai trajet keeps cutting out but restarts after you reset the immobiliser

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6 Suggested Answers

ghost4548
  • 776 Answers

SOURCE: from cold start engine warms to quater temp then

Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Otherwise, guesswork. I have MANY ideas that could send you on a wild goose chase. I strongly suspect EMS (Engine Management System) sensor beginning to malfunction as it warms up. First strong suspicion is the crank position sensor (CKP) - however,usually always sets a DTC (i.e., P0335, P0336). The next suspicion is the Engine Coolant Temperature sensor. The ECM uses this sensor's signal to adjust fuel, timing, engine RPM, etc based on engine temp. If malfunctioning at a particuar point during engine warm up, it could be telling the ECM the temperature is LOWER or HIGHER than it ACTUALLY is, resulting in the ECM to increase fuel (flood it) or give it LESS fuel (starve it). If this malfunction lasts long enough, the ECM will usually set a DTC for that sensor circuit, either a Range/Performance code, or a "LOW Input" or "HIGH Input" code.

Posted on Jun 07, 2009

  • 1071 Answers

SOURCE: its a hyundai trajet,aa said crankshaft sensor not

it is inside the timing cover in most cases with hyundai the timing belt will have to be removed so the crank gear can come off the sensor is usually behind the gear especially if it is a 6cyl if it is a 4 cyl then the wire goes behind the timing belt make sure the timing marks are lined up so when you reassemble it is lined up

Posted on Aug 29, 2009

Testimonial: "Thank you for the advices Ill get cracking on it"

  • 713 Answers

SOURCE: Engine management system comes on hyundai trajet

depending on what code it is showing the problem could be occuring in the tranny the torque convertor could be trying to go out or a shift solenoid causing it to stall.

Posted on Aug 30, 2009

  • 3640 Answers

SOURCE: The engine stops running after 10 minutes of driving

could be a bad crank sensor, a bad crank sensor will let car run for a while then shut down and will not start for 10 to 15 min. and it will repeat this cycle if not fixed.the crankshaft position sensor provides the ignition module and pcm with a crankshaft position signal. the module uses this signal to determine spark for each cylinder. the pcm uses this signal for proper timing of engine.

Posted on Dec 14, 2009

  • 192 Answers

SOURCE: can jump starting the car, blow the computer

Any overcharge situation can corrupt an ECM. Incorrect placement of jumper cables and not grounding properly can definitely damage an ECM (computer) However most people still jump cars like they did before computers.. red to red and black to black.. this is WRONG.. black shoudl be grounded on alternator or car frame. If you did this and didnt ground properly you very well may have corrupted or burnt ECM. If corrupted it may be "reprogrammable" by dealer also called "flashing" if you burned it then it will have to be replaced by dealer as it requires programming to specific VIN of your vehicle.

Posted on Jun 08, 2010

SOURCE: The immobiliser has cut in

Yes. Usually there is a reset switch on the immobilizer. It pops up when it is triggered, just push it back in and it will click and you should be ok. They are usually located on the firewall inside the car on the drivers or passengers side.

Posted on Jan 13, 2011

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The immobiliser has cut in on hyundai santa fe 2002, so the injectors won't work. Can the immobiliser be bypassed?


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Engine management system comes on hyundai trajet


depending on what code it is showing the problem could be occuring in the tranny the torque convertor could be trying to go out or a shift solenoid causing it to stall.

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