P0203 on Chevrolet vehicles
P0203 is named on 13 Chevrolet model years (2020–2024): 72 manufacturer filings and 0 owner reports in NHTSA’s files, across Suburban, Silverado, Tahoe.
Which Chevrolet model years name P0203
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Chevrolet Suburban | Electrical System | 12 | — |
| 2022 Chevrolet Suburban | Engine | 10 | — |
| 2021 Chevrolet Silverado | Electrical System | 7 | — |
| 2021 Chevrolet Tahoe | Engine | 7 | — |
| 2024 Chevrolet Suburban | Electrical System | 6 | — |
| 2022 Chevrolet Silverado | Fuel/Propulsion System | 5 | — |
| 2022 Chevrolet Tahoe | Engine | 5 | — |
| 2020 Chevrolet Silverado | Electrical System | 5 | — |
| 2024 Chevrolet Silverado | Electrical System | 3 | — |
| 2024 Chevrolet Tahoe | Electrical System | 3 | — |
| 2023 Chevrolet Silverado | Electrical System | 3 | — |
| 2023 Chevrolet Suburban | Electrical System | 3 | — |
| 2023 Chevrolet Tahoe | Electrical System | 3 | — |
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.
Chevrolet filings that name P0203
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet filed with NHTSA whose summary names P0203. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIT5751C Service bulletin2020-12-16 · Electrical System — Wiring
- This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
- PIT5751C Service bulletin2020-12-16 · Electrical System
- This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
- 22-NA-087 Service bulletin2022-05-05 · Engine
- This technical bulletin provides a procedure to replace the fuel injector and the wiring harness to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0201, P0202, P0203, P0204, P0205, P0206 and/or P0216 Set.
- 22-NA-087 Service bulletin2022-05-19 · Electrical System
- This technical bulletin provides a procedure to replace the fuel injector and the wiring harness to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0201, P0202, P0203, P0204, P0205, P0206 and/or P0216 Set.
- 22-NA-087 Service bulletin2022-06-15 · Engine And Engine Cooling
- This technical bulletin provides a procedure to replace the fuel injector and the wiring harness to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0201, P0202, P0203, P0204, P0205, P0206 and/or P0216 Set.
- PIE0791 Service bulletin2024-05-30 · Electrical System
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Check Engine Lamp illuminated on Driver Information Center (DIC), and having DTC’s P0202, P0203 Set.
- PIE0791A Service bulletin2024-06-05 · Fuel/Propulsion System
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Check Engine Lamp illuminated on Driver Information Center (DIC), and having DTCs P0202, P0203 Set.
- PIE0791B Service bulletin2024-06-19 · Electrical System
- This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the Check Engine Lamp illuminated on DIC, and having DTCs P0202, P0203 Set.
- PIT5751 Service bulletin2020-06-12 · Engine
- This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
- PIT5751A Service bulletin2020-06-30 · Electrical System — Wiring
- This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
- PIT5751B Service bulletin2020-08-20 · Electrical System — Wiring
- This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
What P0203 means
Source: SAE J2012 / OBD-IIP0203 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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.
Common questions
Source: NHTSA files and the OBD-II standardIs P0203 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 72 manufacturer filings and 0 owner reports naming P0203 on 13 Chevrolet model years (2020–2024). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Chevrolet models does P0203 appear on most?
2021 Suburban (12 documents), 2022 Suburban (10 documents), 2021 Silverado (7 documents).
Does P0203 on a Chevrolet mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.