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| Information saved in
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DME
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| Fault code
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27B0 - P0491
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| Fault text
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Secondary air system flow rate, bank 1
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| Fault description
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Secondary Air Injection System Insufficient Flow (Bank 1)
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| Condition for fault identification
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Test condition: sls_obdh_mdf_max_intg_norm (after roughly 30s)<K_SLS_OBDH_MDF_MIN_DEF and
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sls_obdh_lam_asv_intg_norm < k_SLS_OBDH_MDF_2_MAG or
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sls_obdh_lam_asv_intg_norm < k_SLS_OBDH_ASV_LI_OPE and K_SLS_OBDH_MDF_MIN_DEF>K_SLS_OBDH_MDF_MAX_DEF
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Terminal condition: Engine running
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| .
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Voltage condition: Battery voltage > 10.8 V (k_sls_obd_ub_min)
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| Condition for fault memory entry
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30000 ms
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| Action in service
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1. Disconnect secondary air line
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2. Carry out test routine
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3. If flow is too high, replace the ASV
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4. Otherwise check Line 1 for obstructions and replace as indicated
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| Fault effect and breakdown warning
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MIL is on after 2x engine cold start
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| Driver information
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Warning light: MIL
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| Service instruction
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None
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