P2671 serious

Actuator Supply Voltage 'A' Circuit Low

The P2671 code means the vehicle's onboard diagnostic system has detected: Actuator Supply Voltage 'A' Circuit Low. This is a serious severity code.

My Garage →
Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$100 - $500 (parts and labor)
Recommended Tool
ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This
AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Common Symptoms

  • Check Engine Light on
  • Multiple sensor circuits underperforming
  • Engine idles roughly
  • Throttle response sluggish
  • Various warning lights may illuminate

Probable Causes (Ranked by Likelihood)

  • Low battery voltage or weak charging system Very High
  • High resistance in actuator supply wiring High
  • Corroded power distribution terminal Moderate
  • PCM voltage regulator delivering low output Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2671 is present

  2. Test battery voltage and alternator output

  3. Measure actuator supply voltage at PCM connector

  4. Check power distribution box terminals for corrosion

Frequently Asked Questions

What does P2671 mean?

P2671 indicates an issue with the actuator supply voltage 'a' circuit low. This voltage circuit powers various engine actuators and sensors critical for proper engine operation.

Can I drive with a P2671 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 P2671?

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.

Explore More

Search codes Vehicle-specific fixes Guides By make

Was this helpful?

Share carcodefinder.com with a friend who needs to decode their check engine light.

Browse by symptom → Read repair guides → Fixes by vehicle →