P0507 on 2011-2018 Volvo S60: Causes and Fixes for High Idle RPM

What's Unique About the 2011-2018 Volvo S60

The 5-cylinder turbo engine used in this generation of Volvo S60 has a well-documented weakness in its Positive Crankcase Ventilation (PCV) system. Unlike older Volvos where the PCV box was separate, on this engine the PCV diaphragm is integrated directly into the oil filter housing assembly (also called the oil trap). The rubber diaphragm is prone to tearing. This failure creates a significant vacuum leak, which is the most common reason for a P0507 code on this specific vehicle, often accompanied by a loud whistling or whining noise from the engine.

Symptoms You May Notice

• Check Engine Light is on
• Engine idle speed is higher than normal (e.g., 1000-1500 RPM)
• Rough or fluctuating idle, sometimes surging up and down in Park.
• A distinct, loud whistling or 'tea kettle' whining sound from the engine bay at idle.
• Whistling noise stops or changes when you pull the oil dipstick or remove the oil filler cap.
• Harsh engagement when shifting from Park to Drive
• Increased fuel consumption

Most Likely Causes

1. Failed PCV System Diaphragm 🔴 High Probability The rubber diaphragm inside the oil filter housing is a known failure point on Volvo's 5-cylinder engines. Over time, it becomes brittle from heat and oil exposure, eventually tearing.
   How to confirm: Perform the 'glove test': With the engine warm and running, remove the oil filler cap and place a rubber glove over the opening. If the glove gets sucked inward, your PCV system is likely healthy. If the glove inflates or flutters wildly, the diaphragm has failed and is allowing crankcase pressure to escape into the intake, creating a vacuum leak. A loud whistling that stops when the cap is removed is also a definitive sign.
   Typical fix: Replace the torn PCV diaphragm. This can be done by replacing the diaphragm itself (a low-cost kit) or by replacing the entire oil filter housing assembly for a more comprehensive repair, as other passages can become clogged.
   Est. part cost: $20-$40 for diaphragm kit, $200-$300 for complete housing assembly.
2. Vacuum Leak (Other than PCV) 🟡 Medium Probability
   How to confirm: Perform a smoke test. With the engine off, a smoke machine is used to pump low-pressure smoke into the intake system. Smoke will visibly escape from any cracked hoses, leaking gaskets (like the intake manifold gasket), or loose connections. Pay close attention to the vacuum lines under the intake manifold.
   Typical fix: Replace the cracked hose or faulty gasket that is causing the leak.
   Est. part cost: $10-$150 depending on the specific hose or gasket.
3. Dirty Electronic Throttle Body (ETB) ⚪ Low Probability
   How to confirm: Remove the intake hose connected to the throttle body and visually inspect the throttle plate and bore for carbon buildup. A significant dark, sticky ring around the edge where the plate closes is a sign it needs cleaning.
   Typical fix: Clean the throttle body bore and plate using a dedicated throttle body cleaner and a soft cloth or brush. Do not use aggressive solvents like carburetor cleaner. An idle relearn procedure (often just disconnecting the battery for 15 minutes) may be required after cleaning.
   Est. part cost: $10-$15 for cleaner.

Rare But Worth Checking

• Faulty Mass Airflow (MAF) Sensor: A MAF sensor providing incorrect data can cause idle issues, but it would typically be accompanied by other performance-related codes and is less common than a vacuum leak for this specific code.
• Faulty Electronic Throttle Body (ETB): Complete failure of the throttle body is rare. It is much more likely to be dirty than electronically faulty. This should only be considered after all other causes are ruled out.

Diagnosis Steps

1. Read the code with an OBD-II scanner and check for any other codes, especially lean codes like P2187 or P2096.
2. With the engine warm and idling, listen for a distinct whistling or 'tea kettle' noise. If present, pull the oil dipstick slightly. If the noise changes or stops, a torn PCV diaphragm is almost certain.
3. Perform the 'glove test' to confirm PCV system failure. If the glove inflates, the PCV diaphragm is the culprit.
4. If the glove test is inconclusive and there is no whistle, perform a smoke test on the intake system to check for other vacuum leaks from hoses or gaskets.
5. Inspect the electronic throttle body for carbon buildup. If dirty, clean it thoroughly.
6. If all else fails, use a professional scan tool to monitor live data from the MAF and throttle position sensors to ensure they are reading correctly at idle.

Parts You'll Likely Need

• PCV Oil Filter Housing Assembly (OEM #31338685 (replaces 30788494, 30684381)) — This is the most common failure point causing P0507. The internal diaphragm tears, creating a vacuum leak. Replacing the whole assembly is the most complete fix and recommended by many specialists as other passages can be clogged.
  Trusted brands: Volvo (Genuine OEM), INA, URO Parts
  OEM price range: $225-$300
  Aftermarket price range: $100-$200
• PCV Diaphragm Repair Kit (OEM #N/A (Aftermarket only)) — For a more budget-friendly repair, just the torn diaphragm and cap can be replaced instead of the entire housing. This directly fixes the vacuum leak.
  Trusted brands: Dorman (926-137), Pro Parts Sweden
  OEM price range: N/A
  Aftermarket price range: $20-$40
• Intake Manifold Gasket — If a smoke test reveals a leak at the intake manifold, this gasket will need to be replaced. It is also good practice to replace it if removing the manifold for other service.
  Trusted brands: Victor Reinz, Elring
  OEM price range: $30-$50
  Aftermarket price range: $15-$30

Related Codes That Often Appear With This One

• P2187 — This code means 'System Too Lean at Idle'. A vacuum leak, which is the primary cause of P0507, allows unmetered air into the engine, creating a lean condition that the oxygen sensors detect at idle.
• P2096 — This code means 'Post Catalyst Fuel Trim System Too Lean Bank 1'. Similar to P2187, it indicates a lean condition detected after the catalytic converter, often caused by a significant vacuum leak.

Technical Service Bulletins (TSBs) & Recalls

• While no TSB is directly for P0507, related TSBs for this platform include TJ31007 and TJ34588 for high oil consumption, which can be exacerbated by a faulty PCV system.

Platform-Specific Known Issues

• The PCV system on the 2.5T engine is considered a routine maintenance item, with failure often occurring between 80,000 and 150,000 km (50,000-95,000 miles). Ignoring a failed PCV system can lead to increased crankcase pressure that forces oil past engine seals, causing more expensive oil leaks.

Scan Tool Commands That Help

• Volvo VIDA DICE: Adaptation of the electronic throttle unit — This function should be used after cleaning or replacing the Electronic Throttle Module (ETM). It allows the ECM to relearn the throttle plate's end stops and operational range. Running this adaptation can resolve idle issues that persist after a physical repair.
• Volvo VIDA DICE: ECM Diagnostic Information - Readout of leakage across the throttle blade — When diagnosing a potential dirty throttle body, a technician can use VIDA to read the calculated air leakage. One source for a similar engine suggests a specification of 5-8 g/s; a reading of 0 g/s indicated a severely clogged throttle body that needed cleaning.

Wiring & Ground Locations

• Engine Control Module (ECM) — Located in the engine compartment, on the right side, forward of the strut tower.. The ECM is the central computer that receives data from all engine sensors and controls the throttle body. A poor connection or ground at the ECM can cause a wide range of issues, including incorrect idle control.
• Electronic Throttle Module (ETM) — Bolted to the side of the intake manifold.. This is the component that physically controls airflow at idle. Its wiring harness connects directly to the ECM, and any damage to the harness or connector can cause erratic throttle behavior and trigger P0507.
• Main Engine Ground — A primary ground strap is typically located on the left side of the engine compartment, on the fender.. A weak or corroded main engine ground can cause fluctuating sensor readings and erratic behavior from electronic modules like the ECM and ETM, leading to idle control problems.

Real Owner Repair Stories

• Reddit user with a 2015.5 S60 T5 (2015.5 Volvo S60 T5 2.0L Turbo FWD) — Sudden high idle surging to 1500 RPM at a stop, harsh transmission engagement, and revs climbing past 3000 RPM in Park. Codes P0507 and P0171 (System Too Lean) were present.
  ❌ Tried (didn't work) Initially, no other steps were tried before targeting the most common cause.
  ✅ What actually fixed it Replacing the PCV oil trap assembly fixed the P0507 code and the severe idle/surging symptoms. However, the P0171 lean code returned. The final fix for the remaining P0171 code was cleaning the Mass Airflow (MAF) sensor with dedicated cleaner. Total cost for the user was around $50 for the PCV assembly and MAF cleaner.

"I Checked Everything" — The Actual Cause

• In one documented case on a 2018 XC60 T5 (similar engine platform), a user reported the classic P0507 symptoms of a bouncing, high idle. They took it to an independent mechanic who performed a smoke test and found no vacuum leaks. The user had already replaced the PCV assembly, and a subsequent replacement of the purge valve also did not fix the issue. The problem was noted to only occur in cold months and could be temporarily stopped by using the 'auto hold' brake feature, suggesting a complex interaction between engine load and the idle control system that wasn't a simple, static vacuum leak. The final cause was not resolved by the user.

OEM Part Supersession History

• 30684381, 30788494, 31338684 → 31338685 — Standard part evolution and revision by Volvo for the PCV oil filter housing assembly.
  Heads up: The latest part number, 31338685, is the correct replacement for the entire 2011-2016 S60 2.5L Turbo range and is backward compatible with the earlier part numbers.

Model Year Variations Within This Range

• 2004 and older (for context): On older P2 platform Volvos (pre-2011 S60), replacing the throttle body often required a software download/reprogram via VIDA for the new part to be accepted by the ECM. For the 2011-2018 P3 platform with the Bosch ETM, a replacement is typically plug-and-play, though running the 'Adaptation' function in VIDA is still recommended.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Excessive Oil Consumption 🔴 High — Common on 2012-2016 5-cylinder (B5254T5/T12) and 4-cylinder Drive-E engines. Can start as early as 60,000 miles. Caused by clogged/stuck piston rings. (Ref: Volvo TSB TJ31007, TJ34588; Extended Warranty P10207.)
• Automatic Transmission Shift Issues (Aisin AW55-50/51SN) 🟠 Medium — More common on earlier P3 models. Symptoms include harsh shifting, 'shift flares' between 2nd-3rd gear, or delayed engagement. Often related to a faulty B4 servo cover or internal valve body wear. (Ref: Volvo issued a software update and an improved B4 servo cover to address this.)
• Auxiliary/Drive Belt Tensioner Failure 🔴 High — On the 5-cylinder engines, the drive belt tensioner can fail, causing the belt to shred and get ingested by the crankshaft pulley, leading to catastrophic timing belt failure and engine damage.
• Rear Trailing Arm Bushing Failure 🟡 Low — Bushings can separate, causing a squeaking or groaning noise over bumps. It's an annoying but not critical failure.
• Front Fender Rust 🟡 Low — Leaves and debris can get trapped behind the front fender liners, holding moisture and causing rust to form from the inside out.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this repair, using a used part is generally not recommended for the primary failure component, the PCV oil filter housing. The internal rubber diaphragm is a wear item, so a used part has unknown remaining life and is likely to fail soon. However, a used Electronic Throttle Body (ETB) could be a cost-effective option if the original is confirmed to be electronically faulty, as they are not a high-failure item.

Donor-vehicle mileage cap: roughly under 60000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For a used ETB, inspect the connector for corrosion or bent pins.
• Check the throttle plate for excessive scoring or damage (light carbon is normal and can be cleaned).
• Ask for the donor vehicle's mileage; lower is always better.
• Avoid parts from vehicles with signs of flood or fire damage.

OEM-only on this vehicle (don't cheap out):

• PCV Oil Filter Housing Assembly: While aftermarket options exist, the Genuine Volvo or OEM supplier (INA) parts are strongly recommended for longevity and correct diaphragm material. Cheap aftermarket versions are known to fail prematurely.

Aftermarket brands forum-validated for this vehicle:

• INA (for PCV Housing - often the OEM supplier)
• Dorman (for the diaphragm-only repair kit, part 926-137)
• Victor Reinz / Elring (for intake gaskets)

Brands owners have reported issues with on this vehicle:

• Unnamed, no-brand PCV housing assemblies from online marketplaces are frequently cited on forums as being made of brittle plastic or having diaphragms that fail within months.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P2187 — A lean-at-idle code that often appears alongside P0507 when a failed PCV diaphragm or vacuum leak introduces unmetered air into the system.
• P2096 — A post-catalyst lean trim code that can be triggered by the same vacuum leaks under the intake manifold that cause high idle speeds.
• P0171 — A general lean code frequently associated with the 'tea kettle' whistling of a torn PCV diaphragm or other intake system vacuum leaks.

Frequently Asked Questions