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Jay
Jay, Mechanic
Category: Car
Satisfied Customers: 596
Experience:  5 yrs experience with Gm, 9 years in automotive shops trained at SAIT
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2002 dts: I repair a faulty c-valve

Resolved Question:

How do I repair a faulty c-valve in a 2002 DTS Cadillac. code PO443. I have very little funds. Is this something I can do my self. I am not a mechanic , but I've got to get it done for smog. in a week.
Submitted: 8 years ago.
Category: Car
Expert:  Jay replied 8 years ago.

Hello gloveglo 1! I am not entirely sure what you mean by C-valve but if you had code P0443 then the valve associated with that code is the evap purge valve. I'm guessing you have already had the diagnosis of the work done so assuming this is the faulty part, here is instructions for changing the purge valve which you can do yourself:

 

Evaporative Emission Canister Purge Solenoid Valve Replacement

Removal Procedure


    Object Number: 293272  Size: SH

  1. Disconnect the evaporative emission (EVAP) canister purge valve electrical connector (5).
  2. Disconnect the EVAP purge pipe (4) from the EVAP canister purge valve (3).
  3. Partially open the throttle.
    Object Number: 293273  Size: SH

  4. Remove the EVAP canister purge valve retaining bolt (2).
  5. Remove the EVAP canister purge valve (3) from the intake manifold (1).

Installation Procedure

    Important: Be sure to install a new O-ring on the EVAP purge valve.

  1. Partially open the throttle.
    Object Number: 293273  Size: SH

  2. Position the EVAP canister purge valve (3) on the intake manifold (1).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the EVAP canister purge valve retaining bolt (2).

    Tighten
    Tighten the bolt to 12 N·m (106 lb in).

  4. Allow the throttle to close.
    Object Number: 293272  Size: SH

  5. Connect the EVAP purge pipe (4) to the EVAP canister purge valve (3).
  6. Connect the EVAP canister purge valve electrical connector (5).
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