C1921
0 owner reports and 21 manufacturer filings across 3 model years from Mitsubishi.
Where C1921 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Mitsubishi Mirage | Tires | 8 | — |
| 2017 Mitsubishi Mirage | Tires | 8 | — |
| 2019 Mitsubishi Mirage | Tires | 5 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names C1921. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- TIN1931001REV2019-05-31 · Tires — Pressure Monitoring And Regulating Systems
- This is a Technical Information Notice sent to all dealers. This notice informs dealers that MMNA is looking for a scramble opportunity on a Mirage or Mirage G4 that displays "TPMS light on" issue with "tire ID reception fail" DTC. If a vehicle has C1911, C1921, C1931, or C1941 active or stored then dealers are instructed to stop the diagnosis process and create a Techline case. This notice was re
- TIN-19-31-0012019-04-02 · Tires — Pressure Monitoring And Regulating Systems
- This is a Technical Information Notice sent to all dealers. This notice informs dealers that Mitsubishi Motors North America (MMNA) is looking for a scramble opportunity on a Mirage or Mirage G4 that displays "TPMS light on" issue with "tire ID reception fail" DTC. If a vehicle has C1911, C1921, C1931, or C1941 active or stored then dealers are instructed to stop the diagnosis process and create a
- TIN-19-31-0012019-04-02 · Equipment — Other — Owners/Service/Other Manual
- This is a Technical Information Notice sent to all dealers. This notice informs dealers that Mitsubishi Motors North America (MMNA) is looking for a scramble opportunity on a Mirage or Mirage G4 that displays "TPMS light on" issue with "tire ID reception fail" DTC. If a vehicle has C1911, C1921, C1931, or C1941 active or stored then dealers are instructed to stop the diagnosis process and create a
- TIN-18-31-0022018-05-07 · Electrical System
- This is a Technical Information Notice sent to dealers, to notify them that warranty claims have been received because of concerns of TPMS light illumination. TPMS DTCs C1911, C1921, C1931, and/or C1941 were usually reported. Many dealers have been replacing the affected TPMS transmitters. Investigation results of the replaced transmitters are "NTF"(no trouble found). The notice references the Ser
What C1921 means
Source: SAE J2012 / OBD-IIC1921 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about C1921
Source: NHTSA files and the OBD-II standardWhy does this page not define C1921?
Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.
Can I keep driving with C1921 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.