2B5B

2B5B - P00BD

Information saved in
DME

Fault code
2B5B - P00BD

Fault text
Air-mass sensor, plausibility

Fault description
Air-mass sensor, plausibility

Condition for fault identification
Test condition:
No overrun fuel supply shutdown, no electrical HFM fault,
no load and rpm dynamic response, 10 sec. after engine
start, tmot>60°, 500 30°10V
Terminal condition: Terminal 15
Voltage condition:
Onboard electrical system voltage ub>10V

Condition for fault memory entry
2 sec.

Action in service
Determine whether airflow to engine greater/less than
requirement (vacuum leak, crankcase!)
Check connections/plugs (corrosion, water, etc.) between
HFM and DME (CMI-240, CMI-209 and CME-114)
Replace sensor as indicated

Fault effect and breakdown warning
None
none

Driver information
Warning light:
MIL ON (US only)

Service instruction
None