DTC P0172: 1/1 O2 Sensor Fuel System Rich

NOTE: For component location, see COMPONENT LOCATIONS . For connector identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see WIRING DIAGRAMS . If Powertrain Control Module (PCM) is replaced, PCM must be reprogrammed. See PROGRAMMING .

For testing procedures, see Fig 1-Fig 4 .

Fig 1: DTC P0172: 1/1 Fuel System Rich - Step 1 (1 Of 4)

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Fig 2: DTC P0172: 1/1 Fuel System Rich - Steps 2-6 (2 Of 4)

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Fig 3: DTC P0172: 1/1 Fuel System Rich - Steps 7-9 (3 Of 4)

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Fig 4: DTC P0172: 1/1 Fuel System Rich - Steps 10-13 (4 Of 4)

Courtesy of DAIMLERCHRYSLER CORPORATION