Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSVOLKSWAGEN2012JETTA TDI, 4D SEDAN, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 188 (2.0L - DIESEL FUEL INJECTION - ENGINE CODE: CVCA (HATCHBACK))23 DIESEL FUEL INJECTIONREMOVAL AND INSTALLATIONENGINE CONTROL MODULE -J623- WITH PROTECTIVE HOUSINGREMOVING

2012 Volkswagen Jetta TDI, 4D Sedan, Standard Trans

Engine Control Module -J623- WITH PROTECTIVE HOUSING: Removing

2012 Volkswagen Jetta TDI, 4D Sedan, Standard TransSECTION Removing

WARNING: This page is about a different car, the 2015 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

-- Turn off the ignition.

-- Remove the air filter housing, refer to REMOVING .

-- Remove the E-box cover inside the engine compartment -arrows-.

Fig 1: Identifying Engine Control Module (E-Box) Cover

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-- Free up the wiring harness and pull engine control module upward out of its mount. Push the locking mechanism -arrows- to the side.

Fig 2: Locating Locking Mechanisms

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-- Remove the bolts -A-. Push the wiring harness as far as possible to the side. Remove the locking mechanism -B-.

Fig 3: Locating Wiring Harness And Locking Mechanism

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Unlock the connector and pull it off the engine control module.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.