P0171 on Cadillac 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 9 Cadillac model years (2016–2018): 27 manufacturer filings and 0 owner reports in NHTSA’s files, across CTS, ATS, CT6, ELR, XT5 and 1 more.
Which Cadillac model years name P0171
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Cadillac CTS | Electrical System | 5 | — |
| 2016 Cadillac CTS | Electrical System | 5 | — |
| 2017 Cadillac ATS | Electrical System | 3 | — |
| 2017 Cadillac CT6 | Electrical System | 3 | — |
| 2016 Cadillac ATS | Electrical System | 3 | — |
| 2016 Cadillac CT6 | Electrical System | 3 | — |
| 2017 Cadillac XT5 | Engine | 2 | — |
| 2016 Cadillac ELR | Electrical System | 2 | — |
| 2018 Cadillac CTS-V | Back Over Prevention | 1 | — |
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.
Cadillac filings that name P0171
Source: NHTSA manufacturer communicationsBulletins and campaigns Cadillac 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 · Equipment — Other — Owners/Service/Other Manual
- 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.
- PIP5529B Service bulletin2019-09-06 · Electrical System
- This Preliminary information communicates additional diagnostics and repair to assist in resolving a malfunction indicator lamp illumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.
- 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.
- 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.
- 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.
- PIE0413A Service bulletin2017-11-14 · Engine
- This engineering informational bulletin ends the need for information from the field on vehicles that have the condition of Malfunction Indicator Lamp Illuminated with DTC P0171 and/or P0174.
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 Cadillac 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 Cadillac vehicles?
It is a documented one: NHTSA's files hold 27 manufacturer filings and 0 owner reports naming P0171 on 9 Cadillac model years (2016–2018). 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 Cadillac models does P0171 appear on most?
2017 CTS (5 documents), 2016 CTS (5 documents), 2017 ATS (3 documents).
Does P0171 on a Cadillac 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.