P0393
PowertrainCrankshaft Camshaft Positionmoderate severityCamshaft Position Sensor B Circuit High Input (Bank 2)
What P0393 Means
The PCM reads an abnormally high voltage from the Bank 2 camshaft position sensor B. This often points to a short to voltage or an open ground.
Symptoms
- Hard starting
- Rough running
- MIL illuminated
Common Causes
- Short to voltage in wiring
- Faulty camshaft position sensor
- Open sensor ground
- Corroded connector
Diagnostic Steps
- Retrieve codes and freeze frame
- Measure sensor signal voltage
- Inspect for short to power and ground integrity
- Replace sensor or repair harness
🔌 Don't have a code reader?
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.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
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SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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