P0171 on Chevrolet vehicles The engine is running lean on bank 1: too much air, or not enough fuel, for the mixture the computer wants
P0171 is named on 32 Chevrolet model years (2016–2022): 100 manufacturer filings and 7 owner reports in NHTSA’s files, across Camaro, Colorado, Trax, Equinox, Traverse and 5 more.
Which Chevrolet model years name P0171
Source: NHTSA manufacturer communications and complaintsA 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.
What Chevrolet owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
On September 18,2026 owner #3 bought the vehicle on December 9,2026 at the time of purchase it had 46,545 on September 17 check engine light came on and the diagnostic code came up as P0171 lean bank one from Pep Boys
These are a few of the codes it reads, although some codes come and go, but these remain on: P12E7, P12EC, P12F4, P12F9, P0121, P0171, P0161, P0131, P069E, B097B, B1395, B1516, B1517, B260E, B260E, B2615, B2745, U0800, U1808, U0109, U007C
Chevrolet filings that name P0171
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet filed with NHTSA whose summary names P0171. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP5446 Service bulletin2016-11-30 · 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.
- PIP5529 Service bulletin2017-10-20 · Electrical System
- This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.
- PIP5446A Service bulletin2018-01-18 · Back Over Prevention
- 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.
- PIP5529A Service bulletin2018-02-28 · Electrical System — Instrument Cluster/Panel
- This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.
- PIE0413 Service bulletin2017-05-11 · Engine And Engine Cooling — Exhaust System — Manifold/Header/Muffler/Tail Pipe
- This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Malfunction Indicator Lamp Illuminated with DTC P0171 and/or P0174.
- PIP5240D Service bulletin2018-04-27 · Engine And Engine Cooling
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace
- PIP5240E Service bulletin2018-05-15 · Equipment
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. If the air cleaner housing does not have the correct content for the engine application as shown, dealer is instructed to replace
- 19NA114 Service bulletin2019-05-15 · Electrical System
- This informational bulletin provides information to the tech to test the PCV for proper performance before replacing the camshaft cover to correct a MIL On w/DTC P0171.
- PIP5240A Service bulletin2017-01-25 · Engine And Engine Cooling — Cooling System
- This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing Identification Code. If the Hydro Carbon Absorber is missing, or the Identification code is other than ACD, replace the Air Cleaner
- PIE0433A Service bulletin2017-10-31 · Fuel System, Gasoline
- This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information ? Malfunction Indicator Lamp (MIL) On DTCs P0171 Fuel Trim System Lean Bank 1 and/or P0174 Fuel Trim System Lean Bank 2.
- PIE0433A Service bulletin2017-12-21 · Electrical System — Software
- This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information ? Malfunction Indicator Lamp (MIL) On DTCs P0171 Fuel Trim System Lean Bank 1 and/or P0174 Fuel Trim System Lean Bank 2.
- PIE0433A Service bulletin2017-11-28 · Fuel System, Gasoline
- This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information ? Malfunction Indicator Lamp (MIL) On DTCs P0171 Fuel Trim System Lean Bank 1 and/or P0174 Fuel Trim System Lean Bank 2.
What P0171 means
Source: SAE J2012 / OBD-IIThe engine is running lean on bank 1: too much air, or not enough fuel, for the mixture the computer wants.
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 P0171 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 100 manufacturer filings and 7 owner reports naming P0171 on 32 Chevrolet model years (2016–2022). 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 P0171 appear on most?
2017 Camaro (7 documents), 2016 Camaro (6 documents), 2017 Colorado (6 documents).
Does P0171 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.