P2677 serious

Actuator Supply Voltage 'C' Circuit Low

The P2677 code means the vehicle's onboard diagnostic system has detected: Actuator Supply Voltage 'C' Circuit Low. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$100 - $500 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Actuator group C underperforming
  • Possible VVT or turbo control faults
  • Engine may idle rough
  • Reduced throttle response

Probable Causes (Ranked by Likelihood)

  • Weak battery or failing alternator Very High
  • Resistance in circuit C supply wire High
  • Corroded splice in wiring harness Moderate
  • PCM supply C regulator degraded Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2677 is stored

  2. Load test battery and alternator

  3. Measure supply C voltage at PCM connector

  4. Inspect wiring harness splices for corrosion

Frequently Asked Questions

What does P2677 mean?

P2677 indicates an issue with the actuator supply voltage 'c' circuit low. This voltage circuit powers various engine actuators and sensors critical for proper engine operation.

Can I drive with a P2677 code?

You can drive short distances, but multiple engine systems may be affected. Have the charging and wiring systems checked promptly.

How much does it cost to fix P2677?

Repairs typically cost $100 - $500. A blown fuse is a quick fix, while alternator or wiring repairs cost more.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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