2021-2022 Hyundai P2074 MIL & Engine Performance TSB
Hyundai has issued a Technical Service Bulletin (TSB) for certain 2021-2022 Tucson, Santa Fe, and Sonata models equipped with a 2.5L engine. This TSB addresses a 'Check Engine' light (MIL) and potential reduced engine performance due to DTC P2074 and related codes, resolved by an ECM software…
Si applica anche a
- Hyundai Santa Fe
- 2021–2022
- Hyundai Sonata
- 2021–2022
Certain 2021-2022 Hyundai Tucson, Santa Fe, and Sonata vehicles equipped with a 2.5L engine may experience a 'Check Engine' light (MIL) illuminated on the dashboard. This condition, often accompanied by diagnostic trouble code (DTC) P2074, can also lead to reduced engine performance and a limited power reduction mode.
This issue is addressed by a manufacturer communication, NHTSA ID 10206359, which outlines an Engine Control Module (ECM) software revision. This update aims to improve the logic for accurately detecting the amount of air the engine receives, resolving the underlying cause of the Hyundai Tucson P2074 and related DTCs.
Symptoms
Owners of affected vehicles may observe the following symptoms:
- Illumination of the 'Check Engine' light (MIL).
- Reduced engine performance, feeling sluggish or less responsive.
- The vehicle entering a limited power reduction mode, restricting available power.
Fault Codes / DTCs
When scanned, the vehicle's Engine Control Module (ECM) may store one or more of the following diagnostic trouble codes (DTCs):
| Code | Description | Module |
|---|---|---|
| P2074 | Mass Airflow Sensor Plausibility | ECM |
| P2074F0 | Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Lower Load | ECM |
| P2074F1 | Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Medium or High Load | ECM |
| C136081 | ESP Irreversible Error | ESP |
| C161308 | CAN Signal Error EMS | EMS |
| C161386 | CAN Signal Error EMS | EMS |
| C169381 | Blind-Spot Collision Warning – CAN signal failure - ESC | ESC |
| C174181 | ESC Not Available VSM (Check ESC) | ESC |
| C183586 | CAN Message Failure ESC/IEB | ESC |
Diagnosis and Trigger Conditions
This condition is primarily triggered by an inaccuracy in the Engine Control Module (ECM) software. The original software may not correctly interpret the air intake data, leading to the system misidentifying a problem and setting the Hyundai Tucson P2074 code. This can occur under various load conditions, as indicated by the P2074F0 and P2074F1 sub-codes.
Secondary DTCs related to the Electronic Stability Program (ESP), Electronic Stability Control (ESC), and Controller Area Network (CAN) communication may also be stored as a consequence of the primary engine control issue.
Repair Procedure Summary
The recommended repair involves updating the Engine Control Module (ECM) software. This software revision will update the logic to accurately detect the amount of air the engine is receiving, thereby preventing the erroneous setting of DTC P2074 and resolving the associated performance issues.
Owner Action
If your 2021-2022 Hyundai Tucson, Santa Fe, or Sonata with a 2.5L engine is exhibiting a 'Check Engine' light with symptoms of reduced engine performance, it is recommended to visit an authorized Hyundai dealership. Inform them about the symptoms and the potential relevance of manufacturer communication NHTSA ID 10206359. The dealership technicians can diagnose the issue and perform the necessary ECM software update.
Source: NHTSA ID 10206359
Frequently Asked Questions
- What does the P2074 code mean for my Hyundai?
- The P2074 code, specifically 'Mass Airflow Sensor Plausibility', indicates that your Hyundai's Engine Control Module (ECM) is detecting an implausible reading from the mass airflow sensor, suggesting an issue with how the engine is measuring air intake. This can lead to a 'Check Engine' light and reduced engine performance.
- Which Hyundai models are affected by the P2074 issue?
- This issue primarily affects certain 2020-2022 Hyundai Sonata (DN8a), 2021-2022 Santa Fe (TMa), and 2022 Tucson (NX4/NX4a) vehicles equipped with a 2.5L engine. The NHTSA document specifically links to 2021-2022 models for Tucson, Santa Fe, and Sonata.
- What are the symptoms of the Hyundai Tucson P2074 problem?
- Owners may experience an illuminated 'Check Engine' light (MIL), reduced engine power, and the vehicle entering a limited power reduction mode. You might also notice other related fault codes like C174181 'ESC Not Available VSM (Check ESC)'.
- How is the P2074 problem fixed in affected Hyundai vehicles?
- The resolution for the P2074 issue involves an Engine Control Module (ECM) software update. This update revises the ECM's logic to more accurately detect the amount of air entering the engine, thereby correcting the underlying cause of the diagnostic trouble code and restoring proper engine performance.
- Is there a recall for the Hyundai P2074 DTC?
- No, this is not a recall. It is addressed by a manufacturer communication (Technical Service Bulletin or TSB), NHTSA ID 10206359. While not a recall, Hyundai dealerships are aware of the issue and can perform the necessary ECM software update.
What Hyundai Tucson owners report
Counted from the records in our database across 22 model years.
- 6,738
- Owner complaints
- 37
- Recalls
- 564
- Service bulletins
- 276
- Crashes reported
- 145
- Fires reported
- 256
- Injuries reported
The 2022 model year
509 complaints, the 3rd most of 22 model years on file. Owners reported 31 crashes, 5 fires and 56 injuries for this year, which also has 3 recalls on file.
Engine And Engine Cooling, the system this article covers, accounts for 107 of 6,738 complaints (2%), including 2 for 2022.
Complaints by model year
| 2012 | 255 | |
|---|---|---|
| 2013 | 266 | |
| 2014 | 202 | |
| 2015 | 229 | |
| 2016 | 1,626 | |
| 2017 | 1,095 | |
| 2018 | 399 | |
| 2019 | 385 | |
| 2022 | 509 | |
| 2025 | 451 |
Most-reported systems
- Engine — 2,451
- Power Train — 1,273
- Electrical System — 849
- Service Brakes — 761
- Forward Collision Avoidance — 432
Latest recalls for the 2022 model year
- 25V893000 — Trailer Hitches (Dec 2025) — Park outside
- 23V038000 — Structure (Jan 2023)
- 21V938000 — Electrical System (Dec 2021)
Recent owner reports about engine and engine cooling
Read owner complaints →The contact owns a 2022 Hyundai Tucson. The contact stated while driving 65 MPH, the vehicle lost motive power with the oil warning light illuminated. The contact attempted to accelerate; however, the vehicle failed to respond as needed.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
Related Articles
2021-2024 Hyundai Santa Fe / Tucson DTC U028700 EOP
Hyundai has issued Technical Service Bulletin (TSB) 26-AT-002H for certain 2021-2024 Santa Fe and Tucson vehicles. This TSB addresses diagnostic trouble code U028700, indicating a "Lost Communication With Trans Fluid Pump Module," which can cause the Idle Stop & Go (ISG) system to become…
2022 Hyundai Tucson Inoperable Horn Warranty Extension
Hyundai has issued a warranty extension for certain 2022 Tucson (NX4A) vehicles experiencing an inoperable horn. This issue, detailed in TSB 26-BE-004H, is caused by foreign substances oxidizing internal horn parts. Coverage is extended to 10 years/120,000 miles.
2022 Hyundai Tucson Inoperative Horn TSB 26-BE-004H
Hyundai has issued Technical Service Bulletin 26-BE-004H for certain 2022 Tucson (NX4A) vehicles experiencing an inoperative horn. This TSB extends warranty coverage to 10 years/120,000 miles for horn replacement due to internal oxidation from foreign substances.
2021-2022 Hyundai Anti-Theft Ignition Cylinder Protector TSB
Hyundai has issued Technical Service Bulletin 25-01-089H (Customer Satisfaction Campaign P33) to address vehicle theft concerns by installing an anti-theft ignition cylinder protector and anti-theft decals on various 2021-2022 models.
2021-2022 Hyundai Anti-Theft Ignition Cylinder Protector Campaign P33
Hyundai has launched Customer Satisfaction Campaign P33 for 2021-2022 models, offering a free anti-theft ignition cylinder protector and decals. This hardware upgrade, detailed in TSB 25-01-089H, is available upon customer request to counter social media theft methods.
Leave a comment
Comments are moderated and may take a moment to appear. Only your first name and the initial of your last name are shown publicly.
Comments
Be the first to comment.