Fuel Volume Regulator Control Circuit High
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
Description
The PCM detected a higher than expected signal from the fuel volume regulator control circuit.
Symptoms
- Check Engine Light
- High fuel pressure
- Rich running
- Black exhaust smoke
Common Causes
- Open in regulator ground circuit
- Faulty regulator
- PCM driver failure
- Wiring issue
Diagnostic Steps
- Check circuit voltage
- Test regulator resistance
- Inspect ground connection
- Check PCM output
Repair Notes
Repair open circuit or replace regulator.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
- P0016Crankshaft Position/Camshaft Position Correlation Bank 1 Sensor A
P0004 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code P0004 mean on a 2018-2025 Fiat Cronos?
P0004 stands for "Fuel Volume Regulator Control Circuit High". The PCM detected a higher than expected signal from the fuel volume regulator control circuit.
What are the symptoms of P0004 on a Fiat Cronos?
Common symptoms of P0004 include: Check Engine Light, High fuel pressure, Rich running, Black exhaust smoke.
What causes P0004 on a 2018-2025 Fiat Cronos?
Common causes of P0004 include: Open in regulator ground circuit, Faulty regulator, PCM driver failure, Wiring issue.