P0401 on Jeep
Exhaust Gas Recirculation Flow Insufficient
P0401 on Jeep vehicles indicates exhaust gas recirculation flow insufficient. Au7o has documented this code across 3 Jeep models — most commonly on Commander, Gladiator, Wagoneer. This code means the Exhaust Gas Recirculation (EGR) system is not flowing enough exhaust back into the engine. The EGR system recirculates a small amount of exhaust into the intake to lower combustion temperatures and reduce nitrogen oxide (NOx) emissions; the computer has determined the actual flow is below what it commanded. The most common reason is carbon buildup clogging the EGR valve or its passages. You may notice pinging/knocking, rough idle, or a check engine light, and the car will fail emissions testing. Typical repair costs on Jeep range from $50 to $2,500, depending on the specific model and root cause.
Common Causes of P0401
- •Carbon buildup clogging the EGR valve or passages
- •Stuck or faulty EGR valve
- •Blocked or restricted EGR ports/tubes
- •Faulty EGR temperature or position sensor
- •Faulty DPFE/EGR pressure sensor (on applicable systems)
- •Vacuum leak or failed vacuum control (vacuum-operated EGR)
- •Wiring or connector problems at the EGR valve
P0401 on Jeep by Model
Jeep Commander(1 issue)
- Random Electrical Failures / Dashboard Warning Lights2006-2010
The Commander is plagued by random electrical issues where dashboard warning lights illuminate and extinguish without cause, the HVAC system shuts off randomly, and various accessories behave erratically. This can occur 1-15 times per day while driving or parked. The issues are often traced to corroded ground connections, a failing TIPM (Totally Integrated Power Module), or wiring harness degradation.
Jeep Gladiator(1 issue)
- Death Wobble / Steering Shimmy2020-2025
The solid front axle design on the Gladiator is susceptible to "death wobble," a violent shaking of the front end typically triggered by hitting a bump at highway speeds. NHTSA received over 170 steering complaints for the 2020 model year alone. Contributing factors include worn ball joints, loose track bar bolts, and degraded steering stabilizer. Recall 21V-853 addressed lower ball joints on vehicles built between 9/16/2020 and 8/4/2021.
Jeep Wagoneer(1 issue)
- 5.7L eTorque Engine Stalling at Low Speeds2022-2025
The 5.7L HEMI V8 with eTorque mild-hybrid system can stall at slow speeds, causing the vehicle to unexpectedly shift into park and apply the emergency brake. NHTSA opened a formal investigation after at least 80 owner complaints. The 48V eTorque motor-generator unit and its integration with the transmission control system appear to be the root cause. Some owners report the vehicle cannot be restarted after stalling.
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What does P0401 mean on Jeep?▼
P0401 stands for "Exhaust Gas Recirculation Flow Insufficient." This code means the Exhaust Gas Recirculation (EGR) system is not flowing enough exhaust back into the engine. The EGR system recirculates a small amount of exhaust into the intake to lower combustion temperatures and reduce nitrogen oxide (NOx) emissions; the computer has determined the actual flow is below what it commanded. The most common reason is carbon buildup clogging the EGR valve or its passages. You may notice pinging/knocking, rough idle, or a check engine light, and the car will fail emissions testing. On Jeep specifically, this code is documented across 3 models.
What causes P0401 on Jeep vehicles?▼
Common causes on Jeep: Carbon buildup clogging the EGR valve or passages, Stuck or faulty EGR valve, Blocked or restricted EGR ports/tubes, Faulty EGR temperature or position sensor, Faulty DPFE/EGR pressure sensor (on applicable systems). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0401 on a Jeep?▼
Repair costs on Jeep range from $50 to $2,500, depending on the specific model and root cause.
Which Jeep models have P0401 documented?▼
Au7o has documented P0401 on 3 Jeep models: Commander, Gladiator, Wagoneer.