1996 Mercedes Benz C220 Diagnostic Smoke Test

This vehicle has had several diagnostic codes coming from both sides of the PCM. Individually, the codes can lead you in several directions. They are P1341 which is the camshaft control logic chain for the timing solenoid (Y49). While the other side of the PCM shows a 21 for idle speed control at upper stop limit and 35 for oxygen sensor control system rich stop/mix to lean condition. After a cold soak test, the manifold vacuum was pulling around 50% of anticipated inches of mercury that it should have had. This led me to believe the problem is a leak in the manifold system. This smoke test was performed to confirm and verify my judgement, which it did. The intake manifold system indeed has a breach.

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Autos & Vehicles

Tags:

• Mercedes-Benz
• Smoke Testing