3 Series E46 320d (M47TU) SAL
OBD-2 code: P 0442
M62 with DME MS 7.2:
-
BMW fault code: 183
Description: Tank leak detected
OBD-2 code: P 0442
S62 with DME MSS 52:
-
BMW fault code: 180
Description: Tank leak detected
OBD-2 code: P 0442
M73 with DME M 5.2.1:
-
BMW fault code: 183
Description: Tank leak detected
OBD-2 code: P 0442
Explanation: Within the framework of the OBD-2 systems checks legally required in the
USA, the fuel tank system is checked for leaks after each cold start (coolant temperature
less than 30 degrees Celsius). To this end, the tank system of vehicles with OBD-2 is
checked for leaks while the engine is running. If the values measured are not reliable, as it
is the case with the filler pipe open, the fuel tank system is assumed to have developed a
leak. This leads to the fault codes stated above being stored after the first start test. After
the second start test, the "CHECK ENGINE" lamp will light up.
Note: Fault messages "major/minor leak" may also have other causes. Only the description
"major leak" indicates an inadequately sealed fuel filler cap.
Cause:
Inadequately sealed fuel filler cap:
1.
Result of insufficient sealing pressure at too small a closing angle. The fuel filler cap is
often not turned to the stop.
2.
Retaining strap on fuel filler cap caught between the filler pipe and the fuel filler cap.
See Figure 1.
3.
Refuelling with the engine running.
SI Introduction of new fuel filler caps for US models E36 Z3 E38 E39 E46 US only
BMW AG - TIS
12.02.2013 10:19
Issue status (12/2007) Valid only until next DVD is issued
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