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 manifold tuning valve (MTV) actuator fails, causing a loss of low-end torque and a check engine light. The MTV opens and closes a passage between the split intake plenums to change the effective plenum volume 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 manifold tuning valve actuator. If the MTV is leaking where it bolts to the upper plenum, replacing its O-ring may be enough before replacing the valve.
Sources for this issue (3)
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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or stuck Short Runner Valve actuator/motor (Chrysler group), Intake manifold runner control mechanism stuck or binding, Outdated PCM software requiring a TSB update, Wiring or connector fault to the SRV actuator, Carbon buildup restricting runner flap movement, Vacuum/electrical control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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.