P0402
EGR Flow Excessive Detected
2018-2025 Fiat Cronos 1.0L I4 Flex Firefly
Moderate SeverityPowertrainGeneric (SAE)
Description
The EGR system is flowing too much exhaust gas.
Symptoms
- Check Engine Light
- Rough idle
- Stalling
- Surging
- Poor acceleration
Common Causes
- EGR valve stuck open
- Faulty EGR solenoid
- Vacuum leak to EGR valve
- Faulty DPFE sensor reading low
Diagnostic Steps
- Check EGR valve for stuck-open condition
- Test EGR solenoid
- Check vacuum lines
- Test DPFE/position sensor
Repair Notes
Replace EGR valve if stuck open. Repair vacuum lines.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- 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
P0402 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 P0402 mean on a 2018-2025 Fiat Cronos?
P0402 stands for "EGR Flow Excessive Detected". The EGR system is flowing too much exhaust gas.
What are the symptoms of P0402 on a Fiat Cronos?
Common symptoms of P0402 include: Check Engine Light, Rough idle, Stalling, Surging, Poor acceleration.
What causes P0402 on a 2018-2025 Fiat Cronos?
Common causes of P0402 include: EGR valve stuck open, Faulty EGR solenoid, Vacuum leak to EGR valve, Faulty DPFE sensor reading low.