What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P011A:00ECT sensor No.1/No.2 performance problemP011A:00ECT SENSOR NO.1/NO.2 PERFORMANCE PROBLEMP011A:00ECT SENSOR NO.1/NO.2 PERFORMANCE PROBLEM THIS IS CAUSED BY ERROR DETECTION LOGIC OF THE PCMManufacturer communications
7Original wording in English
MAZDA
Reported code forms P011A:00
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…
MAZDA
Reported code forms P011A:00
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…
MAZDA
Reported code forms P011A
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…
MAZDA
Reported code forms P011A
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…
MAZDA
Reported code forms P011A P011A:00
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…
MAZDA
Reported code forms P011A P011A:00
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…
Check vehicle applicability
44A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | EXPRESS | 2008 |
| Chevrolet | EXPRESS | 2007 |
| Chevrolet | KODIAK | 2008 |
| Chevrolet | KODIAK | 2007 |
| Chevrolet | SILVERADO | 2008 |
| Chevrolet | SILVERADO | 2007 |
| GMC | SAVANA | 2008 |
| GMC | SAVANA | 2007 |
| GMC | SIERRA | 2008 |
| GMC | SIERRA | 2007 |
| GMC | TOPKICK | 2008 |
| GMC | TOPKICK | 2007 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.