P0603 on Nissan vehicles The engine control module has lost its keep-alive memory
P0603 is named on 94 Nissan model years (2016–2021): 214 manufacturer filings and 1 owner report in NHTSA’s files, across NV, Versa, NV200, Rogue, Murano and 15 more.
Which Nissan model years name P0603
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 Nissan 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.
engine light was on and nissan ran a diagnostic and found the code number p0603 and needs a new ECM -this could cause an accident as the driver can loose control of vehicle at any moment causing the driver and others at high risk -the…
Nissan filings that name P0603
Source: NHTSA manufacturer communicationsBulletins and campaigns Nissan filed with NHTSA whose summary names P0603. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- NTB16-018c Service bulletin2018-04-09 · Engine And Engine Cooling
- MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin does NOT apply to Titan equipped with Cummins V8 Diesel engine. This bulletin has been amended to add a NOTE in the Applied Vehicles. No other changes have been made. Please discard previous versions of this bulletin.
- NTB16-018D Service bulletin2021-04-01 · Engine And Engine Cooling
- MIL ON WITH P0603 STORED FOR ECM BACK UP CIRCUIT This bulletin has been amended. See AMENDMENT HISTORY on page 3. Please discard previous versions of this bulletin.
- NTB16018 Service bulletin2016-02-22 · Electrical System
- IF YOU CONFIRM The MIL is "ON" with DTC P0603 (ECM BACK UP/CIRCUIT). ACTION 1. Confirm that the battery voltage is 11 volts, or more, with the ignition ON (engine OFF, not running). 2. Erase DTC 3. Perform DTC confirmation steps in the Service Procedure. 4. Confirm 1st trip DTC P0603 is not stored. NOTE: P0603 is often the result of low battery voltage
- NTB21-027 Service bulletin2021-04-01 · Engine And Engine Cooling
- MIL ON WITH DTC P062F AND/OR P0603 STORED IF YOU CONFIRM The MIL is ON and DTC P062F (EEPROM) and/or P0603 (ECM BACK UP/CIRCUIT) is stored, And The customer stated the vehicle was recently started after sitting for an extended period of time (i.e., the battery voltage was low while attempting to start the engine). ACTION 1. Test the vehicleâs 12 volt battery using the Midtronics DSS-50
What P0603 means
Source: SAE J2012 / OBD-IIThe engine control module has lost its keep-alive memory.
A stored code names the test that failed, never the part that caused it. The record above is what Nissan 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 P0603 a known problem on Nissan vehicles?
It is a documented one: NHTSA's files hold 214 manufacturer filings and 1 owner report naming P0603 on 94 Nissan model years (2016–2021). 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 Nissan models does P0603 appear on most?
2016 NV (8 documents), 2019 NV (7 documents), 2018 NV (7 documents).
Does P0603 on a Nissan 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.