Tech Tip: Kia Optima Won't Rev, Sets Code P0350
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Tech Tip: Kia Optima Won’t Rev, Sets Code P0350

On some Kia Optima vehicles, a P0350 code is set, indicating a faulty ignition coil circuit. At times the engine runs bad and won’t rev up; that is when it sets the code.

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Vehicle application:
– 2002 and 2004 Kia Optima 2.4L, Vin 6, Eng Cfg L4
– 2005 Kia Optima EX 2.4L, Vin 6, Eng Cfg L4

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Customer Concern:
The vehicle has a code P0350, indicating a faulty ignition coil circuit. At times the engine runs bad and won’t rev up; that is when it sets the code.

Potential Causes: Ignition coil, ignition failure sensor
Diagnostic Codes: P0350

Tests/Procedures:
1. Monitor the power to the coils when the problem occurs, if the coils have a drop in voltage, the ignition failure sensor may be faulty. The ignition failure sensor has four wires and is located near the back of the engine close to the coils.

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2. Monitor the white and pink coil triggering signals with a lab scope to see if the signals look different when the problem occurs. If so, the coils may be faulty.

Courtesy of Identifix.

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