Old Jan 25, 2010 | 02:31 PM
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s2-ross
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From: Essex
Question Help with fault code please - engine light on!

Hey guys, any help would be really appreciated with this! I'm Having some issues with my gf's Ka at the mo, its jerking when accelerating in 1st and 2nd gear and the engine light has come on. I ran a diagnostic test through the dash where you hold down the trip computer button and it gave the fault code "dt 412" .

Cant find a definitive explanation of the code but there seem to be 2 different definitions:

Either:

P0412 - Secondary Air Injection System (AIR) circuit malfunction The PCM attempts to control when air is injected in the exhaust. The DTC indicates a Secondary Air injection system AIR circuit fault. AIR circuit open
AIR bypass solenoid fault
Damaged PCM
AIR circuit short to power
Solid state relay fault
Damaged AIR pump
The AIR circuit is normally held high through the AIR bypass solenoid and SSR when the output driver is off. Therefore, a low AIR circuit indicates a driver is always on and a high circuit indicates an open in the PCM.

http://forums.focaljet.com/team-tech...-dtc-ford.html


Or:

412 (R) Idle speed system not controlling idle properly (generally idle too low) - ISC

http://www.troublecodes.net/Ford/

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Given the symptoms which are jerking while accelerating in 1st and 2nd gear, what is the more likely cause of the problem?

Thanks in advance for any help!

Ross
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