Question about 1999 Hyundai Sonata

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Error code P0350

G'day Dennis  I have the same problem with my 1999 sonata was wondering if you have found the solution

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  • collective72 Dec 06, 2008


    like you tested coils, both within range. Ended up replacing both ignition coils about $200 and car is like new again. thanks for all your help.



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Yes I did.
The problem turned out to be the second coil. The first coil I tested was bad and replaced, but the second coil tested good using the pages at the Hyundai pages. Once I broke down and took the car to the shop they replaced the second coil that tested 'bad' on their computer testing. The cost was less than $200 and the car now runs like new again at about 150K miles.

I hope this helps,

Posted on Nov 20, 2008


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P0352 - Ignition Coil B Primary/Secondary Circuit Description: See the description for DTC P0350. Possible Causes: See the possible causes for DTC P0350. Diagnostic Aids: See the diagnostic aids for DTC P0350. Application Key On Engine Off Key On Engine Running Continuous Memory Coil-on-plug (COP) ignition testing - GO to Pinpoint Test JF . GO to Pinpoint Test JF . Coil pack ignition testing - GO to Pinpoint Test JE . GO to Pinpoint Test JE .
P0350 - Ignition Coil Primary/Secondary Circuit Description: Each ignition primary circuit is continuously monitored. The test fails when the powertrain control module (PCM) does not receive a valid ignition diagnostic monitor (IDM) pulse signal from the ignition module (integrated in the PCM). Possible Causes:
  • Open or short in the Ignition START/RUN circuit
  • Open coil driver circuit
  • Coil driver circuit shorted to ground
  • Damaged coil
  • Coil driver circuit shorted to VPWR
Diagnostic Aids: Use the 12-volt non-powered test lamp to verify START/RUN voltage at the ignition coil harness connector.
Check the coil driver circuit for open, short to VPWR, or short to ground. Application Key On Engine Off Key On Engine Running Continuous Memory Coil pack ignition testing GO to Pinpoint Test JC . Coil-on-plug (COP) ignition testing GO to Pinpoint Test JB . Without me testing , it's hard to say what you got going on ! Coil packs ? What engine does it have ? 5.4 L ? should have coil on plug ignition .

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