P0402 on Dodge
Exhaust Gas Recirculation Flow Excessive
P0402 on Dodge vehicles indicates exhaust gas recirculation flow excessive. Au7o has documented this code across 1 Dodge model — most commonly on Journey. P0402 means the Exhaust Gas Recirculation (EGR) system is flowing too much exhaust back into the intake. The EGR system intentionally routes a small amount of inert exhaust gas into the engine to lower combustion temperatures and reduce nitrogen-oxide emissions, but the flow must be metered precisely. When the PCM determines the flow is excessive — often because the EGR valve is stuck open or letting gas through when it shouldn't — it sets this code. Too much EGR can cause rough idle, stalling, hesitation, and a check engine light. Typical repair costs on Dodge range from $400 to $1,200, depending on the specific model and root cause.
Common Causes of P0402
- •EGR valve stuck open or not closing fully
- •Failed or sticking EGR valve diaphragm/solenoid
- •Carbon buildup holding the EGR valve open
- •Faulty EGR position or differential pressure (DPFE) sensor
- •Leaking EGR valve gasket or pintle seat
- •Vacuum control or solenoid fault commanding EGR open
- •Wiring or connector problems in the EGR control circuit
P0402 on Dodge by Model
Dodge Journey(1 issue)
- 3.6L Oil Filter Housing Leak2011-2020
Plastic oil filter housing on 3.6L Pentastar warps, cracks, and leaks due to heat exposure. Housing located under intake manifold, making leaks difficult to detect until severe. Heat degradation causes plastic to become brittle and crack.
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View P0402 across all makes →Frequently Asked Questions
What does P0402 mean on Dodge?▼
P0402 stands for "Exhaust Gas Recirculation Flow Excessive." P0402 means the Exhaust Gas Recirculation (EGR) system is flowing too much exhaust back into the intake. The EGR system intentionally routes a small amount of inert exhaust gas into the engine to lower combustion temperatures and reduce nitrogen-oxide emissions, but the flow must be metered precisely. When the PCM determines the flow is excessive — often because the EGR valve is stuck open or letting gas through when it shouldn't — it sets this code. Too much EGR can cause rough idle, stalling, hesitation, and a check engine light. On Dodge specifically, this code is documented across 1 model.
What causes P0402 on Dodge vehicles?▼
Common causes on Dodge: EGR valve stuck open or not closing fully, Failed or sticking EGR valve diaphragm/solenoid, Carbon buildup holding the EGR valve open, Faulty EGR position or differential pressure (DPFE) sensor, Leaking EGR valve gasket or pintle seat. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0402 on a Dodge?▼
Repair costs on Dodge range from $400 to $1,200, depending on the specific model and root cause.
Which Dodge models have P0402 documented?▼
Au7o has documented P0402 on 1 Dodge model: Journey.