P05A0 on Subaru vehicles
P05A0 is named on 7 Subaru model years (2016–2018): 23 manufacturer filings and 0 owner reports in NHTSA’s files, across Legacy/Outback, Forester, WRX, Impreza.
Which Subaru model years name P05A0
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Subaru Legacy/Outback | Electrical System | 6 | — |
| 2016 Subaru Legacy/Outback | Electrical System | 6 | — |
| 2017 Subaru Forester | Electrical System | 3 | — |
| 2017 Subaru WRX | Electrical System | 3 | — |
| 2016 Subaru WRX | Electrical System | 3 | — |
| 2018 Subaru Forester | Electrical System | 1 | — |
| 2017 Subaru Impreza | Electrical System | 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.
Subaru filings that name P05A0
Source: NHTSA manufacturer communicationsBulletins and campaigns Subaru filed with NHTSA whose summary names P05A0. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 11-174-17R Service bulletin2017-06-23 · Electrical System — 12V/24V/48V Battery
- This bulletin announces the availability of reprogramming files to optimize the ECM and address the following customer concerns: * Check Engine light coming on (with DTC P05A0 stored in memory). * Potential battery discharge (dead battery) after repeated periods of short-trip driving. * A high (or "hanging") engine RPM after depressing the clutch pedal (Forester only).
- 11-174-17R Service bulletin2017-08-08 · Electrical System
- This bulletin announces the availability of reprogramming files to optimize the ECM and address the following customer concerns: * Check Engine light coming on (with DTC P05A0 stored in memory). * Potential battery discharge (dead battery) after repeated periods of short-trip driving. * A high (or "hanging") engine RPM after depressing the clutch pedal (Forester only).
- 11-174-17R Service bulletin2017-10-31 · Electrical System — Software
- This bulletin announces the availability of reprogramming files to optimize the ECM and address the following customer concerns: ? Check Engine light coming on (with DTC P05A0 stored in memory). ? Potential battery discharge (dead battery) after repeated periods of short-trip driving. ? A high (or ?hanging?) engine RPM after depressing the clutch pedal (Forester only).
- 1117217 Service bulletin2017-02-23 · Electrical System — Software
- This bulletin announces the availability of reprogramming files to optimize the ECM. The new logic will address isolated customer concerns of a hesitation and / or a stumble felt on light acceleration and in some cases, a possible DTC P05A0 which may set in the ECM memory.
What P05A0 means
Source: SAE J2012 / OBD-IIP05A0 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 Subaru 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 P05A0 a known problem on Subaru vehicles?
It is a documented one: NHTSA's files hold 23 manufacturer filings and 0 owner reports naming P05A0 on 7 Subaru 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 Subaru models does P05A0 appear on most?
2017 Legacy/Outback (6 documents), 2016 Legacy/Outback (6 documents), 2017 Forester (3 documents).
Does P05A0 on a Subaru 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.