DTC 2342

1. Check the idle speed and CO level. If they are both within specification the problem is intermittent. If they are not within specifications continue.
2. Check and repair possible vacuum leaks at the intake system (injector seals, intake boot, etc.) .
3. Verify correct operation of the carbon canister frequency valve and solenoid valve (check for leaks). Refer to COMPONENT TESTING.
4. Check the cold start valve for possible leaks. Refer to FUEL SYSTEMS.
5. With the ignition "OFF", disconnect the Motronic control unit harness connector. The Motronic control unit is located beneath the drip tray, at the left rear (drivers side) of the engine compartment.
6. Connect a suitable volt/ohm meter between terminal 7 and 35 of the Motronic control unit harness connector. Set the volt/ohm meter to ohms.

Special Tools:

CAUTION: Avoid damaging the delicate connectors within the control unit harness connector. A simple set of test leads can be fabricated using flat connectors (part # VW N 17 457 2) or equivalent, and a pair of alligator clips.

^ The correct measurement should be infinite ohms (no continuity).

5. Disconnect the green wire at terminal T1k of the oxygen sensor and connect it to ground. Refer to CHASSIS ELECTRICAL DIAGRAMS.

^ The correct measurement should be 0 ohms (continuity).

If the correct measurement is not obtained, repair or replace the harness as necessary. Refer to CHASSIS ELECTRICAL DIAGRAMS.
If the correct measurement is obtained, refer to COMPONENT TESTING for checking the oxygen sensor.