2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 65
0.5 sec. with pump active
5 sec. when inactive
Action in service
1) Electrical check on wire
2) Visual inspection of plug-in connectors (at both
component and DME ends)
3) Use tester to trigger components
4) Relay replacement
Fault effect and breakdown warning
Driver information
Warning light:
MIL ON
Service instruction
none
2A03 - P1453 (DME)
2A03 - P1453
Information saved in
DME
Fault code
2A03 - P1453
Fault text
Secondary-air pump relay, activation
Fault description
Secondary Air Injection Pump Relay Control Circuit
Electrical
Condition for fault identification
Test condition:
Control activation monitor, in post-start phase when pump is
triggered
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
0.5 sec. with pump active
5 sec. when inactive
Action in service
1) Electrical check on wire
2) Visual inspection of plug-in connectors (at both
component and DME ends)
3) Use tester to trigger components
4) Relay replacement
Fault effect and breakdown warning
