2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
79
P140A
2A00 - P140A
Information saved in
DME
Fault code
2A00 - P140A
Fault text
Secondary-air system
Fault description
Secondary Air Injection System Insufficient Total Flow
(Bank 1 and Bank 2)
Condition for fault identification
Test condition:
Activation conditions:
- Engine start
- Secondary air-injection must be active
- Ambient temperature >3 掳C
-3.8 掳C < Coolant temperature < 50.3 掳C
Terminal condition: Terminal 15, engine start
Voltage condition:
Vehicle electrical system voltage (battery voltage between 7
& 15 V)
Condition for fault memory entry
40 sec.
Action in service
1. Visual inspection from connecting hose between
secondary air injection pump (SAP) and secondary airinjection
valve (SAV). Replace the hose if it is damaged.
2. Determine whether hose is connected.
- if not - connect hose. A click must be audible when the
hose is connected.
3. Conduct EOL test and listen to determine whether SAP is
running or not:
- if yes - determine whether the pump is producing pressure
(hold with hand), it should be possible to feel pressure
- of not - check wiring to pump (plug, relay, wiring),
conduct EOL test with pump supplied by separate 12V
power source. (With additional fault code entry => Replace
pump)
4. Remove SAV from motor and connect to the hose. -
Conduct EOL test and use hand to determine whether air is
flowing through the valve.
If so, then the valve is defective and must be replaced.
If not, valve is OK
5. Clean the passage between exhaust gas banks 1 and 2 (in
engine block)
6. Install SAV again, run through EOL test. If the
malfunction is registered again, repeat steps 5 and 6.
Fault effect and breakdown warning
