P0101 on Chevrolet vehicles The mass air flow sensor is reporting a figure the engine computer does not believe for the conditions

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names P0101. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5651 Service bulletin
  2019-05-21 · Power Train
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5651A Service bulletin
  2019-06-12 · Engine And Engine Cooling — Cooling System
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5651B Service bulletin
  2019-06-20 · Engine And Engine Cooling
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5710 Service bulletin
  2020-02-11 · Engine
• This Preliminary information communicates the possiblilty of the charge air cooler tube becoming disconnected from the throttle body and causing reduced power with dtc P0172 P0299 P0101 P0506 P1101
• PIE0569 Service bulletin
  2020-05-21 · Engine
• This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Hesitation and/or Stalls, DTCs P0172, P0299, P0101, P0506 and/or P1101 Set.
• PIE0569B Service bulletin
  2020-07-15 · Engine
• This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Hesitation and/or Stalls, DTCs P0172, P0299, P0101, P0506 and/or P1101 Set.
• PIP5710A Service bulletin
  2020-08-27 · Engine And Engine Cooling
• This Preliminary information communicates the possiblilty of the charge air cooler tube becoming disconnected from the throttle body and causing reduced power with dtc P0172 P0299 P0101 P0506 P1101
• PIP5651E Service bulletin
  2021-06-24 · Power Train
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5651F Service bulletin
  2021-08-19 · Structure
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5468 Service bulletin
  2017-02-10 · Engine
• This Preliminary Information communication provides information to the technician about vehicles that have a check engine light on. Technician may find Diagnostic Trouble Codes P0101, P0299 and / or P11DC. Technician will need to follow publish Service Information diagnostics first. If Service Information diagnostics do not isolate a root cause of the concern the technician should check for loose
• PIP5446 Service bulletin
  2016-11-30 · Power Train — Automatic Transmission
• This Preliminary Information communication provides information to the technician about vehicles that have a Harsh Shift 1/2 and 2/3 and Sputter Applying Throttle Between 0 and 30%, Rough idle. Technician may find Diagnostic Trouble Codes P0101, P0171, P0172, P0174, and or P0175. Technician should inspect for cast flashing near the Mass Air Flow sensor as seen below.
• PIP5468D Service bulletin
  2017-10-03 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary Information communication provides information to the technician about vehicles that have a check engine light on. Technician may find Diagnostic Trouble Codes P0101, P0299, P0712, P11CC, P11DC, P20EE, P2002, P2463, P2627, P2A00, P2459, P22B6, P200C, P200E, P0263, P0266, P0269, P0272, P0275, P0278, P0281 and/or P0284. Technician will need to follow publish Service Information diag

A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.