P1004 on 1999-2001 Chrysler LHS — Short Runner Valve (SRV) Control Performance (manufacturer-specific)
1 vehicles · 1 makes · $150-$400 repair
How to diagnose and fix P1004: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Chrysler LHS · 1999–2001
The 3.5L V6 intake manifold runner control (IMRC) valve actuator fails, causing a loss of low-end torque and a check engine light. The IMRC system varies intake runner length for optimal power across the RPM range.
Common Symptoms
- Check engine light
- Reduced low-end power
- Slight decrease in fuel economy
- Rattling from intake area
How to Fix
Replace the intake manifold runner control actuator. Some aftermarket solutions include deleting the system and pinning the runners in the open position, though this reduces low-end torque slightly.
Sources for this issue (1)
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P1004 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P1004 mean?
P1004 stands for "Short Runner Valve (SRV) Control Performance (manufacturer-specific)." P1004 is a manufacturer-specific powertrain code, so its exact meaning depends on the maker. On Chrysler, Dodge, Jeep, and Ram vehicles it most commonly indicates a Short Runner Valve control performance problem, where the engine computer detected that the intake manifold's variable-runner (SRV) flaps are not responding as commanded. On Volkswagen/Audi it instead refers to a cylinder 1 torque-difference fault. It generally points to an intake air-management or fueling concern that can affect smoothness and power.
What are the most common causes of P1004?
The most common causes of P1004 are: Failed or stuck Short Runner Valve actuator/motor (Chrysler group), Intake manifold runner control mechanism stuck or binding, Outdated PCM software requiring a TSB update, Wiring or connector fault to the SRV actuator, Carbon buildup restricting runner flap movement, Vacuum/electrical control problem, On VW/Audi: cylinder 1 fueling or compression imbalance. The specific cause varies by vehicle.
How much does it cost to fix P1004?
Repair costs for P1004 range from $150 to $400, depending on the vehicle and root cause.
Which vehicles are affected by P1004?
Au7o has documented P1004 across 1 vehicle models from 1 manufacturers: Chrysler.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.