P0390moderate severityPowertrain
Camshaft Position Sensor B Circuit (Bank 2)
on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
The PCM detects a fault in the Bank 2 camshaft position sensor B circuit. This can affect timing accuracy and fuel/spark synchronization on that bank.
Symptoms
- Hard starting
- Rough running or stalling
- Check engine light on
Common causes
- Faulty camshaft position sensor
- Damaged sensor wiring or connector
- Bad reluctor/tone wheel
- PCM circuit fault
Diagnostic steps
- Scan for related cam/crank codes
- Inspect sensor and connector on Bank 2
- Check sensor air gap and tone ring
- Test signal with scope, replace if faulty
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1