P0068 Air flow, manifold pressure and throttle position do not add up — often an intake leak
3 owner reports and 116 manufacturer filings across 49 model years from Buick, Cadillac, Chevrolet, GMC and others.
Where P0068 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where P0068 appears most; it is on file for 49 in total.
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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P0068 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0068 on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
On march 23, 2020, car was running with rough idle and check engine light came on pulling codes P0108 and P0068
116 manufacturer filings name P0068. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0068.
- VIN4APIN20250213 Other2025-02-13 · Unknown Or Other
- Customer states MIL-on, P0442 stored in ECM memory; Customer states MIL-on, P0068 stored in ECM memory; Customer states Electrical System Error Message, U04A1 [42304], U04A5 [42336], and/or U04A9 [42444] stored in DA:008C; Customer states vehicle does not start; key not detected. No communication to J519 active. AW 19: U014000[2170894][2240526], B1248F3[1074443], U17B900[8398624] active DTC’s; Cus
- VIN4APIN20250129 Other2025-01-29 · Unknown Or Other
- Customer states MIL-on, P0442 stored in ECM memory; Customer states MIL-on, P0068 stored in ECM memory; Customer states the seat cover has discoloration (usually yellowing) stains; Customer states Electrical System Error Message, U04A1 [42304], U04A5 [42336], and/or U04A9 [42444] stored in DA:008C; Customer states vehicle does not start; key not detected. No communication to J519 active. AW 19: U0
- VIN4APIN20250121 Other2025-01-21 · Unknown Or Other
- Customer states MIL-on, P0442 stored in ECM memory; Customer states MIL-on, P0068 stored in ECM memory; Customer states the seat cover has discoloration (usually yellowing) stains; Customer states Electrical System Error Message, U04A1 [42304], U04A5 [42336], and/or U04A9 [42444] stored in DA:008C; Customer states vehicle does not start; key not detected. No communication to J519 active. AW 19: U0
- 21-01-041H Service bulletin2021-05-18 · Engine And Engine Cooling
- This bulletin provides information related to the Engine Control Module (ECM) software update for 2020MY Elantra (AD/ADA) vehicles equipped with 2.0L engine to revise the logic for the DTCs listed below. ï· P0068 - Manifold Pressure (MAP) Sensor/Mass Air flow (MAF) Sensor - Throttle Position Correlation ï· P0101 - Mass Air flow (MAF) Sensor - Range/Performance ï· P0106 - MAP Sensor / Baro
- TSB_FUE047 Service bulletin2020-08-14 · Equipment Adaptive/Mobility
- TECHNICAL SERVICE BULLETIN NU 2.0L MPI MIL ON DTC P010100 AND/OR P010600 AND/OR P006800 LOGIC IMPROVEMENT - This bulletin provides the procedure to improve the logic of the Engine Control Module (ECM) software and clean the Electronic Throttle Control (ETC) on some 2019-2020MY Forte (BDm) vehicles equipped with NU 2.0L MPI Atkinson engine, which may exhibit a MIL with DTC P0101, and/or P0106 and/o
- Campaign T5B Dea Service bulletin2020-06-24 · Engine And Engine Cooling
- Certain vehicles may experience an illuminated warning light due to Diagnostic Trouble Codes (DTC). This service campaign provides information on the procedures to perform the ECU and TCU update, and, if necessary, replace the IVT (Intelligent Variable Transmission) to resolve this condition. ⢠TCU DTC Codes: P0730, P0731, P0741, P0867, P1603 ⢠ECU DTC Codes: P0106, P0068, P0101
What P0068 means
Source: SAE J2012 / OBD-IIAir flow, manifold pressure and throttle position do not add up — often an intake leak.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P0068
Source: NHTSA files and the OBD-II standardCan I keep driving with P0068 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.