Details On DTCs
WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
| DESCRIPTION |
Fuel trim system too lean |
| DETECTION CONDITION |
Determination conditions |
- Any one of the following conditions is met:
- The sum of the fuel feedback correction amount (SHRTFT1) and the fuel learning correction amount (LONGFT1) is the specified value (30 %
) or more, and 10 s or more
have elapsed with the fuel learning correction amount (LONGFT1) at the specified value (15 %
) or more.
- While the engine is idling or the vehicle is driven, the fuel feedback correction amount reaches the upper limit (25 % or more
) for 20 s or more
.
|
| Preconditions |
- Engine coolant temperature: 0-45 °C {32-113 °F}, 60 °C {140 °F} or more *1
- *1
: Value can be verified by displaying PIDs using M-MDS
|
| Malfunction determination period |
|
| Drive cycle |
|
| Self test type |
|
| Sensor used |
|
| FAIL-SAFE FUNCTION |
|
| VEHICLE STATUS WHEN DTCs ARE OUTPUT |
- Illuminates check engine light.
|
| POSSIBLE CAUSE |
- Erratic signal to PCM
- ECT sensor No. 1 signal malfunction
- MAF sensor signal malfunction
- MAP sensor signal malfunction
- IAT sensor No. 2 signal malfunction
- Related connector or terminals malfunction
- Related wiring harness malfunction
- High-pressure side fuel delivery system malfunction
- Fuel pressure sensor malfunction
- Relief valve (built-into high pressure fuel pump) malfunction
- Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
- Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction
- High pressure fuel pump malfunction
- Fuel leakage in fuel line
- Low-pressure side fuel delivery system malfunction
- Fuel filter clogged (built-into fuel pump unit)
- Low pressure side fuel line restriction (between fuel pump unit and high pressure fuel pump)
- Fuel pump unit malfunction
- Pressure regulator (built-into fuel pump unit) malfunction
- Fuel pump control module malfunction
- Fuel injector malfunction
- Improper operation of fuel injector
- Fuel injector related wiring harness malfunction
- Improper operation of purge control system
- Purge solenoid valve malfunction
- Purge solenoid hoses improper connection
- PCV valve malfunction
- MAF sensor malfunction
- Air cleaner element malfunction
- MAP sensor malfunction
- Air suction in intake air system
- Improper operation of electric variable valve timing control system
- Electric variable valve timing driver malfunction
- Electric variable valve timing motor malfunction
- Electric variable valve timing actuator malfunction
- Improper operation of hydraulic variable valve timing control system
- A/F sensor malfunction
- A/F sensor loose
- Exhaust system leakage
- Poor fuel quality
- PCM malfunction
|