Quote:
Originally Posted by Fen335i
Hi Guys - I have two error codes being thrown. Anyone know what the solution is to fix the issues?:
1) 274B Lambda sensor pump current assimilation error VKAT bank 2
2) 27B0 Secondary air system throughput bank 1 (2)
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274B - P2629
Oxygen sensor pump current calibration fault before cat. converter, bank 2
O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)
Oxygen sensor is available, oxygen sensor voltage > 4951 mV (K_LAVK_OBD_SA_DIAG_OL)
Terminal condition: Engine running - overrun condition
After a defined SA phase the lag period K_LAVK_OBD_SA_T (2.5 sec) must be completed
1. Check plug and wiring harness on pre-cat oxygen sensor LSVK B2 (especially trim circuit wire IA),
2. If OK, replace oxygen sensor
MIL lamp on after engine runs 2x /Small influence on drivability
27B0 - P0491
Secondary air system flow rate, bank 1
Secondary Air Injection System Insufficient Flow (Bank 1)
sls_obdh_mdf_max_intg_norm (after roughly 30s)<K_SLS_OBDH_MDF_MIN_DEF and sls_obdh_lam_asv_intg_norm < k_SLS_OBDH_MDF_2_MAG or 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
Battery voltage > 10.8 V (k_sls_obd_ub_min)
Condition for fault memory entry: 30000 ms
1. Disconnect secondary air line
2. Carry out test routine
3. If flow is too high, replace the ASV
4. Otherwise check Line 1 for obstructions and replace as indicated
My Suggestion:
Replace bank 2 sensor 1 oxygen sensor, clear faults, and see if SES light returns.