Engine-Codes - Generic - P12E3

P12E3 - Cylinder Deactivation Exhaust Flow Valve Control Circuit Open

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P12E3 Possible Causes

  • Faulty Cylinder Deactivation Exhaust Flow Valve
  • Cylinder Deactivation Exhaust Flow Valve harness is open or shorted
  • Cylinder Deactivation Exhaust Flow Valve circuit poor electrical connection

How do I fix code P12E3?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P12E3 code

Labor: 1.0

The cost of diagnosing the P12E3 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P12E3 Meaning

The cylinder deactivation exhaust flow control system consists of valves installed at the inlet of the muffler. The exhaust flow control system is used to tune the exhaust note. The Powertrain Control Module (PCM) monitors the Cylinder Deactivation Exhaust Flow Valve. The PCM sets the OBDII code when the Cylinder Deactivation Exhaust Flow Valve is not to factory specifications.

P12E3 More Information

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Information for specific makes

  • P12E3 CHEVROLET Cylinder Deactivation Exhaust Flow Valve Control Circuit Open
  • P12E3 GMC Cylinder Deactivation Exhaust Flow Valve Control Circuit Open

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