P0398
PowertrainCrankshaft Camshaft Positionmoderate severityCamshaft Position Sensor B Circuit High (Bank 2)
What P0398 Means
The PCM reads excessive voltage from the camshaft position sensor B on Bank 2. A short to voltage or wiring fault is commonly involved.
Symptoms
- Hard start
- Rough idle
- MIL on
Common Causes
- Short to voltage in circuit
- Faulty camshaft position sensor
- Open ground wire
- Corroded connector
Diagnostic Steps
- Read codes and freeze frame
- Measure signal circuit voltage
- Check for short to power source
- Replace sensor or repair wiring
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Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
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Serious DIY~$100
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Autel MaxiCOM MK808S →
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✓ Autel official store
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Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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