Engine-Codes - Generic - P12A4

P12A4 - Fuel Rail Pump Control Valve Stuck Closed

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

P12A4 Possible Causes

  • Faulty Fuel Rail Pump Control Valve
  • Fuel Rail Pump Control Valve harness is open or shorted
  • Fuel Rail Pump Control Valve circuit poor electrical connection

How do I fix code P12A4?

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 P12A4 code

Labor: 1.0

The cost of diagnosing the P12A4 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)

P12A4 Meaning

The Engine Control Module (ECM) monitors the Fuel Rail Pump Control Valve. The ECM sets the OBDII code when the Fuel Rail Pump Control Valve is not to factory specifications.

P12A4 More Information

Need more information on how to fix the P12A4 code?
Get Access to Factory Service Manuals

Information for specific makes

  • P12A4 AUDI Fuel Rail Pump Control Valve Stuck Closed
  • P12A4 BMW Absolute Pressure Sensor Intake Manifold Plausibility Intake Manifold Pressure Too Low
  • P12A4 MINI Absolute Pressure Sensor Intake Manifold Plausibility Intake Manifold Pressure Too Low
  • P12A4 PORSCHE Fuel Rail Pump Control Valve Stuck Closed
  • P12A4 VOLKSWAGEN Fuel Rail Pump Control Valve Stuck Closed

Need more help?

Get the P12a4 code diagnosed by a professional: Find a repair shop in your area