VTCS Fault
2016-2021 Mazda CX-3 2.0L I4 🇩🇪
Description
The PCM has detected a fault in the Variable Tumble Control System. The VTCS controls intake air tumble by opening and closing runner valves to improve combustion efficiency at various engine speeds.
Symptoms
- Check Engine Light
- Slight loss of performance at certain RPMs
- Minor fuel economy reduction
Common Causes
- VTCS solenoid valve failure
- VTCS actuator stuck from carbon
- Wiring issue in VTCS circuit
- VTCS vacuum supply leak
- Connector corrosion
Diagnostic Steps
- Test VTCS solenoid resistance
- Command VTCS with scan tool and verify actuator movement
- Inspect VTCS actuator for carbon binding
- Check vacuum supply to VTCS
- Inspect wiring and connector
Repair Notes
Replace the VTCS solenoid or clean the VTCS actuator if stuck from carbon.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P1512 on Other Vehicles
Common Questions
What does code P1512 mean on a 2016-2021 Mazda CX-3?
P1512 stands for "VTCS Fault". The PCM has detected a fault in the Variable Tumble Control System. The VTCS controls intake air tumble by opening and closing runner valves to improve combustion efficiency at various engine speeds.
What are the symptoms of P1512 on a Mazda CX-3?
Common symptoms of P1512 include: Check Engine Light, Slight loss of performance at certain RPMs, Minor fuel economy reduction.
What causes P1512 on a 2016-2021 Mazda CX-3?
Common causes of P1512 include: VTCS solenoid valve failure, VTCS actuator stuck from carbon, Wiring issue in VTCS circuit, VTCS vacuum supply leak, Connector corrosion.