P1381PowertrainManufacturer-specific code

Variable Cam Timing Overadvanced (Bank #1) / Misfire Detected - No Communication with BCM

P1381 is an OBD-II trouble code that indicates variable cam timing overadvanced (bank #1) / misfire detected - no communication with bcm. This page explains what the code means, what issues may trigger it, common symptoms and where to look next.

P1381 code meaning is one of the most common OBD-II searches when a warning light appears on the dashboard.

Drivers searching for P1381 usually want to know what the code means, whether the car is safe to drive and what part may need testing first.

Likely causes

• Worn spark plugs or ignition parts
• Injector or fueling imbalance
• Compression-related engine issue
• Timing issue
• Faulty cam/crank sensor
• Oil flow or VVT problem

Symptoms

• Check engine light illuminated
• Engine shaking or rough idle
• Loss of power under acceleration
• Hard starting or stalling
• Reduced performance

Severity

High

Can you keep driving?

It is usually best not to keep driving for long with a misfire, because it can damage the catalytic converter and worsen engine running.

Common fix areas

• Inspect spark plugs and ignition coils
• Check injector performance and fuel delivery
• Test compression if misfire persists
• Scan all fault codes and freeze-frame data
• Inspect wiring, connectors and grounds
• Confirm repair with a retest after clearing codes

Manufacturer notes

Manufacturer-specific: This code may vary in wording depending on the vehicle brand and model.

OEM scan tools: Confirm the exact text with a brand-specific diagnostic scanner whenever possible.

FAQs

What does P1381 mean?

P1381 means variable cam timing overadvanced (bank #1) / misfire detected - no communication with bcm.

What can cause P1381?

Common causes include component failure, wiring faults, incorrect sensor readings, leaks, pressure issues or related upstream faults in the same system.