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Engine diagnostic indicator lights, irregular engine operation and fault code P201A and/or P201B stored - AF01.30-P-2400A

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ENGINE 271 in MODELS 203, 209, 211 

ENGINE 271.944 ## up to 677489 in MODEL 171.442 

MODIFICATION NOTES

18.4.07 Work units table updated, part number changed    
OPERATION NO. OF OPERATION TEXTS OR STANDARD TEXTS AND FLAT RATES

Category Op. no. Operation text
PPP 024237 Perform pressure loss test
PPP 015760 REMOVE/INSTALL CYLINDER HEAD
Damage code Cause Remedy  
01 206 D1 Valve guide wear results in leaky valve seat rings 1 Perform pressure loss test and determine whether actual values are within the permissible tolerance range. If required, inspect engine with inspection lamp. AR01.00-P-1300HA
  IMPORTANT Only outlet valves are affected. IMPORTANT Only when pressure loss values for cylinders differ noticeably and valve seat rings are leaky: ↓  
  IMPORTANT Engine shakes when idling, engine diagnosis lamp comes on, DTC P201A or P201B stored (misfiring with or without damage to catalytic converter) 2 Remove/ install/replace cylinder head  
    Engine 271.944 in model 171.442 AR01.30-P-5800V
    Engine 271.940 in Model 203.042/, 209.342 AR01.30-P-5800QK
    Engine 271.946 in model 203.046 /246 /746  
    ENGINE 271.948 in MODEL 203.040/ 740  
    Engine 271.942 in model 203.043 /243 /743, 209.343 /443  
    Engine 271.941 in model 211.042/ 242 AR01.30-P-5800TK
    IMPORTANT Send result (readings) of pressure loss test and STAR-DIAGNOSIS error protocol together with old part through the usual guarantee channels.  
Determine damage code according to condition   IMPORTANT If loss pressure is not increased, do not remove cylinder head and proceed as follows: ↓  
    3 Check whether misfiring is present SI07.00-P-0008A
    4 Desensatize idle roughness recognition with STAR DIAGNOSIS  

Valve seat ring without traces of wear 

Fig 1: Identifying Valve Seat Ring Without Traces Of Wear
G04731218

Valve seat ring with traces of wear 

Fig 2: Identifying Valve Seat Ring With Traces Of Wear (1 Of 2)
G04731219

Valve seat ring with traces of wear 

Fig 3: Identifying Valve Seat Ring With Traces Of Wear (2 Of 2)
G04731220
PARTS ORDERING NOTES

Part no. Designation Quantity
A 271 010 60 20 Cylinder head (complete with valves and valve springs) 1
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