P011A
2 owner reports and 34 manufacturer filings across 21 model years from Mazda.
Where P011A shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2016 Mazda CX-5 | Equipment | 7 | 2 | |
| 2016 Mazda Mazda3 | Equipment | 3 | — | |
| 2016 Mazda Mazda6 | Equipment | 3 | — | |
| 2017 Mazda CX-5 | Equipment | 2 | — | |
| 2018 Mazda Mazda3 | Equipment | 2 | — | |
| 2017 Mazda Mazda3 | Equipment | 2 | — | |
| 2019 Mazda CX-3 | Electrical System | 1 | — | Battery → |
| 2018 Mazda CX-3 | Engine | 1 | — | |
| 2017 Mazda CX-3 | Electrical System | 1 | — | Battery → |
| 2016 Mazda CX-3 | Engine | 1 | — | |
| 2019 Mazda CX-9 | Electrical System | 1 | — | Battery → |
| 2018 Mazda CX-9 | Electrical System | 1 | — | Battery → |
| 2017 Mazda CX-9 | Engine | 1 | — | |
| 2016 Mazda CX-9 | Electrical System | 1 | — | Battery → |
| 2019 Mazda MX-5 | Electrical System | 1 | — | Battery → |
| 2018 Mazda MX-5 | Engine | 1 | — | |
| 2017 Mazda MX-5 | Electrical System | 1 | — | Battery → |
| 2016 Mazda MX-5 | Engine | 1 | — | |
| 2019 Mazda Mazda3 | Engine | 1 | — | |
| 2018 Mazda Mazda6 | Equipment | 1 | — | |
| 2017 Mazda Mazda6 | Equipment | 1 | — |
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.
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P011A by make
The same record, one make at a time: the model years, bulletins and owner reports that name P011A on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
Immediately after service, check engine light illuminated (P011A – engine coolant temperature sensor correlation issue)
34 manufacturer filings name P011A. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P011A.
- 07-007-19-3638 Service bulletin2019-11-04 · Electrical System
- Some customers may complain about poor heater performance even after the engine reaches normal operating temperature. This may be caused by a plugged heater core. For 2014-2016 Mazda6 and 2013-2016 (US spec) / 2017 (Mexico spec) CX-5, the CHECK ENGINE light may turn on with DTC P011A:00 (ECT sensor No.1/No.2 performance problem) stored at the same time. NOTE: Refer to TSB 01-015/15 if the customer
- 07-007-17-3384 Service bulletin2017-09-08 · Equipment — Appliance — Air Conditioner
- Some customers may complain about poor heater performance even after the engine reaches normal operating temperature. This may be caused by a clogged heater unit. For Mazda6 and CX-5, the check engine light may illuminate with the DTC P011A:00 stored at the same time. P011A:00 ECT sensor No.1/No.2 performance problem. NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperat
- SA218 Service bulletin2016-03-01 · Engine
- IF YOU ENCOUNTER A 2013-2016 CX-5 WITH DTC P011A WITH OVERHEATING AND/OR NO HEAT FROM THE HEATER, COMPARE THE HEATER PERFORMANCE TO ANOTHER CX-5. IF ANOTHER CX-5 IS NOT AVAILABLE, CHECK THE HEATER CORE FLOW AND IF RESTRICTED, DRAIN/REPLACE COOLANT AND REPLACE THE HEATER CORE. NOTE: IF THE CODE IS SET BY ITSELF, WITHOUT OVERHEATING AND/OR NO HEAT FROM THE HEATER, FOLLOW THE WORKSHOP MANUAL ON MS3 O
- SA218 Service bulletin2016-03-01 · Equipment — Other — Owners/Service/Other Manual
- IF YOU ENCOUNTER A 2013-2016 CX-5 WITH DTC P011A WITH OVERHEATING AND/OR NO HEAT FROM THE HEATER, COMPARE THE HEATER PERFORMANCE TO ANOTHER CX-5. IF ANOTHER CX-5 IS NOT AVAILABLE, CHECK THE HEATER CORE FLOW AND IF RESTRICTED, DRAIN/REPLACE COOLANT AND REPLACE THE HEATER CORE. NOTE: IF THE CODE IS SET BY ITSELF, WITHOUT OVERHEATING AND/OR NO HEAT FROM THE HEATER, FOLLOW THE WORKSHOP MANUAL ON MS3 O
- 01-015-15-3064A Service bulletin2015-09-16 · Equipment — Other — Owners/Service/Other Manual
- SOME VEHICLES USING AN AUXILIARY HEATER (BLOCK HEATER) MAY EXPERIENCE THE CHECK ENGINE LIGHT ON WITH DTC P0116:00 OR P011A WHEN STARTING IN COLD WEATHER BELOW 32 °F (0 °C). P0116:00: ECT SENSOR NO.1 CIRCUIT RANGE/PERFORMANCE PROBLEM P011A:00: ECT SENSOR NO.1/NO.2 PERFORMANCE PROBLEM THIS IS CAUSED BY ERROR DETECTION LOGIC OF THE PCM. TO CORRECT THE PROBLEM, THE CONTROL LOGIC OF THE PCM HAS BEE
- 01-015-15-3064 Service bulletin2015-07-21 · Equipment — Other — Owners/Service/Other Manual
- SOME VEHICLES USING AN AUXILIARY HEATER (BLOCK HEATER) MAY EXPERIENCE THE CHECK ENGINE LIGHT ON WITH DTC P0116:00 OR P011A WHEN STARTING IN COLD WEATHER BELOW 32 °F (0 °C). P0116:00: ECT SENSOR NO.1 CIRCUIT RANGE/PERFORMANCE PROBLEM P011A:00: ECT SENSOR NO.1/NO.2 PERFORMANCE PROBLEM. THIS IS CAUSED BY ERROR DETECTION LOGIC OF THE PCM. TO CORRECT THE PROBLEM, THE CONTROL LOGIC OF THE PCM HAS BE
What P011A means
Source: SAE J2012 / OBD-IIP011A 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. 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 P011A
Source: NHTSA files and the OBD-II standardCan I keep driving with P011A stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. 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.