AutoCodes - Ford - P0412 2003 FORD F150

P0412 2003 FORD F150 Code - Secondary Air Injection System Switching Valve 'A' Circuit Malfunction

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3
Table of contents

|P0412 2003 FORD F150 code possible causes

  • Faulty Air Pump inoperative
  • Air bypass solenoid harness is open or shorted
  • Air bypass solenoid circuit poor electrical connection

|How do I fix the P0412 2003 FORD F150 code?

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.

|P0412 2003 FORD F150 code tech notes

The PCM attempts to control when air is injected in the exhaust. The DTC indicates a Secondary Air injection system AIR circuit fault.

|Cost of diagnosing the P0412 2003 FORD F150 code

Labor: 1.0

The cost of diagnosing the P0412 2003 FORD F150 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0412 2003 FORD F150 code detected?

The DTC P0412 is detected the the AIR vacuum control solenoid circuit not operating as desired by the PCM.

|What are P0412 2003 FORD F150 code possible symptoms?

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

|P0412 2003 FORD F150 code description

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.
OBDII Code P0412 2003 Ford F150 - Secondary Air Injection System Switching Valve 'A' Circuit Malfunction - AutoCodes.com

|Need more information with the P0412 2003 FORD F150 code?

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|P0412 2003 FORD F150 code comments

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Repair Importance Level: 2
 
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