Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2009 Kia Spectra LX, 2.0 1FACTORY OEM SERVICE PROCEDURE

P0038: Ho2S Heater Control Circuit High (Bank1/Sensor2): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	Electrical Check	Open or short to battery in control harness Contact resistance in connectors Faulty HO2S
Enable Conditions	10V < Battery voltage < 16V 1% < Heater power < 99%
Threshold Value	Short to Battery or Line break
Diagnostic Time	10 sec.
Fail Safe	Heater open loop control
Mil On Condition	2 Driving Cycles

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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