Emissions - MIL ON/Multiple DTC's Stored in Memory
Group: 01Number: 02-04
Date: Aug 22, 2002
Subject:
Malfunction Indicator Light ON, DTCs P0410, P0411, P1200 or P1423 Stored in DTC Memory
Model(s):
New Beetle with 1.8L Turbo 1999 ---> 2001
(APH Engine code)
Condition
Malfunction Indicator light (MIL) ON, Diagnostic trouble code(s) (DTC)s P0410, P0411, P1200, or P1423 stored in DTC memory.
May be caused by a cracked or broken (braided cloth covered) vacuum hose(s) (due to temperature variations).
Most common DTCs associated with broken or cracked vacuum hoses are P0410, P0411, P1200, P1423.
Production
Engine number "Code letters" and "Serial number" can be found on the front of the engine near the engine / transmission joint (Engine code APH shown).
Engine/serial number may also be located on a label on the cylinder head cover and vehicle data plate.
Vacuum hose material and configuration changed with introduction of Engine codes AWP and AWV.
Service
- Connect the VAS 5051 or VAS 5052 Diagnostic tool.
- Check for DTC P0411 (or related DTCS) stored in DTC memory.
- Remove upper engine cover.
- Inspect for damaged vacuum hoses.
- Replace damaged vacuum hoses using repair kit Part No: 06A198011B.
CAUTION!
Part numbers are for reference only. Always check with your Parts Dept. for the latest parts information.
^ Repair kit Part No: 06A198011B: contains 2 loose hoses, 9 additional Hoses (assembled with non-return valve and 4 plastic unions), 1 vacuum elbow and 7 clamps.
Note:
Always install complete hose kit
For Secondary air injection hose overview, see Repair Manual, Engine Mechanical, Repair Group 26, Exhaust system emission controls, Secondary air system components, removing and installing.
- Hose kit will replace hoses as follows
^ Secondary air injection (AIR) solenoid valve (N112) -1- to Combination valve -7-.
^ Secondary air injection (AIR) solenoid valve (N112) -1- to Non-return valve -4- (with plastic Tees to Vacuum reservoir -2- and Recirculating valve for turbocharger (N249) -3-.
^ Recirculating valve for turbocharger (N249) -3- to Charge pressure bypass valve -5-.
^ Intake manifold to Recirculating valve for turbocharger (N249) -3-.
^ Intake manifold to new Non-return valve.
^ Intake manifold to Fuel pressure regulator -6-.
^ Secondary air injection (AIR) solenoid valve (-N112-) -1- to Combination valve -7-.
Hose kit, overview
- Illustration shows new hose from intake port to fuel pressure regulator (black arrows).
- Illustration shows new hose assembly (with Y-piece) from second intake manifold vacuum port routed towards rear of engine.
- Illustration shows hose assembly connected to Recirculating valve (white arrow) for turbocharger -N249-.
Hose from non-return valve (black arrow) routes to the vacuum port on the back of Recirculating valve for turbocharger -N249- (using a plastic T-piece) then, routes to the vacuum reservoir using a plastic T-piece then routes to the (AIR) solenoid valve -N112-.
- Illustration shows hose assembly installed at (AIR) solenoid valve -N112- (white arrow) using new vacuum elbow (included in kit).
- Install new hose from (AIR) solenoid valve -N112- to Combination valve (see next illustration).
- Illustration shows new hose from (AIR) solenoid valve -N112- (white arrow) installed to Combination valve (black arrow).
- Illustration shows new hose installed from Recirculating valve for turbocharger (N249) (white arrow) to Charge pressure bypass valve (black arrow).
With all hoses replaced:
- Reinstall upper engine cover.
- Erase any stored DTCs using the VAS 5051 or 5052 Diagnostic tool.
When procedure applies to vehicles within the New Vehicle Limited Warranty, use the table shown.