P1686high severityPowertrain
No SKIM Bus Messages Received
on 2000 Ram 1500 3.9L V6 · 4WD
What this code means
The PCM is not receiving messages from the Sentry Key Immobilizer Module (SKIM) over the bus. This can prevent the engine from starting due to anti-theft lockout.
Symptoms
- Engine no-start or stalls
- Security light on
- Immobilizer active
Common causes
- Faulty SKIM module
- Bus wiring open or shorted
- Poor connector or ground
- Failed PCM
Diagnostic steps
- Scan for SKIM and network codes
- Check SKIM power and grounds
- Test bus continuity to PCM
- Verify SKIM communication with scan tool
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Other Powertrain codes on this vehicle
P0001
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P0002
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P0003
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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