P2004 on Nissan
Intake Manifold Runner Control Stuck Open (Bank 1)
P2004 on Nissan vehicles indicates intake manifold runner control stuck open (bank 1). Au7o has documented this code across 1 Nissan model — most commonly on Altima. P2004 means the intake manifold runner control for engine bank 1 is stuck in the open position. Many engines use flaps or valves inside the intake manifold that close at low RPM to boost air velocity and torque, then open at higher RPM; this code sets when the computer commands those runners to close but a sensor shows they remain open. The result is usually rough low-speed running, reduced low-end power, or hesitation. It indicates a mechanical or actuator problem in the variable intake system, not a true vacuum or fuel issue. Typical repair costs on Nissan range from $400 to $1,200, depending on the specific model and root cause.
Common Causes of P2004
- •Stuck or seized intake manifold runner flaps (carbon buildup)
- •Failed intake manifold runner control actuator or solenoid
- •Disconnected or broken actuator linkage/rod
- •Faulty intake runner position sensor
- •Damaged wiring or connector at the actuator/sensor
- •Vacuum leak or failed vacuum supply on vacuum-operated systems
- •Cracked or warped intake manifold
P2004 on Nissan by Model
Nissan Altima(1 issue)
- 2.5L PR25DD Direct-Injection Carbon Buildup and Intake Manifold Runner Fault (P2004, TSB NTB20-083A)2019-2022
The 2.5L PR25DD four-cylinder used in 2019+ Altimas is direct-injection only, so fuel never washes the back of the intake valves. Over time carbon/soot accumulates on the intake valves and on the intake-manifold runner control flaps, causing rough idle, hesitation, reduced power, and reduced fuel economy. On 2019-2020 models in particular, cold weather can cause the intake-manifold runner control to stick and set DTC P2004 (Intake Manifold Runner Control Stuck Open, Bank 1); Nissan's TSB NTB20-083A directs replacement of the intake manifold to resolve the fault. As a GDI engine, the PR25DD generally benefits from periodic intake-valve cleaning (walnut blasting) at higher mileage.
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View P2004 across all makes →Frequently Asked Questions
What does P2004 mean on Nissan?▼
P2004 stands for "Intake Manifold Runner Control Stuck Open (Bank 1)." P2004 means the intake manifold runner control for engine bank 1 is stuck in the open position. Many engines use flaps or valves inside the intake manifold that close at low RPM to boost air velocity and torque, then open at higher RPM; this code sets when the computer commands those runners to close but a sensor shows they remain open. The result is usually rough low-speed running, reduced low-end power, or hesitation. It indicates a mechanical or actuator problem in the variable intake system, not a true vacuum or fuel issue. On Nissan specifically, this code is documented across 1 model.
What causes P2004 on Nissan vehicles?▼
Common causes on Nissan: Stuck or seized intake manifold runner flaps (carbon buildup), Failed intake manifold runner control actuator or solenoid, Disconnected or broken actuator linkage/rod, Faulty intake runner position sensor, Damaged wiring or connector at the actuator/sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2004 on a Nissan?▼
Repair costs on Nissan range from $400 to $1,200, depending on the specific model and root cause.
Which Nissan models have P2004 documented?▼
Au7o has documented P2004 on 1 Nissan model: Altima.