P2280 on 2013-2018 Ram 2500 6.7L Cummins: Air Flow Restriction Causes and Fixes

What's Unique About the 2013-2018 Ram 2500

On the 6.7L Cummins engine, code P2280 is uniquely and frequently tied to the factory Crankcase Ventilation (CCV) system. The CCV filter is a maintenance item with a service life of approximately 67,500 miles. As it clogs with soot and oil, it loses its ability to separate oil mist from crankcase gases, which are then routed into the air intake. This oil saturates the large paper air filter, causing a severe restriction that the truck's sensors detect, triggering the P2280 code. This specific failure pattern is the most common reason a Ram Cummins owner will see this code.

Symptoms You May Notice

• Check Engine Light is on
• "Service Air Filter" message may appear on the instrument cluster
• Reduced engine power, sometimes referred to as "limp mode"
• In severe cases, power may be limited to 5 mph
🎬 See how to fix the 5mph power limit and service message.
• Poor fuel economy
• Sluggish or delayed throttle response
• Rough or fluctuating idle
• Stalling at low speeds
• More frequent DPF regeneration cycles, as noted by some owners

Most Likely Causes

1. Oil-Soaked Air Filter due to Clogged CCV Filter 🔴 High Probability The CCV filter is a standard maintenance item with a ~67,500-mile lifespan. As it fails, it loses its ability to separate oil from crankcase gases, which are then routed into the air intake, saturating the filter. This is a well-documented issue, with some internal dealer documents (like #9003821) specifically citing it as the cause for P2280. Manufacturer TSB Bulletin #9003821 confirms that customers are experiencing a MIL with DTC P2280 and oil-soaked air intake filters are being replaced to service the vehicle.
   How to confirm: Open the air filter housing and visually inspect the paper air filter. It will have dark, greasy patches and feel oily to the touch, even if it isn't particularly dirty with dust.
   Typical fix: Replace both the engine air filter and the crankcase ventilation (CCV) filter kit. This addresses the symptom (clogged air filter) and the root cause (failed CCV filter).
   Est. part cost: $130-$230
2. Collapsed or Disconnected Air Intake Hose 🟡 Medium Probability These trucks feature a Ram 'Active Air' system with a flexible, corrugated snorkel running inside the driver's side fender. This hose is made of a paper-like material that can degrade and collapse internally, completely blocking the secondary air inlet path.
   How to confirm: After confirming the air filter is clean, remove the driver's side fender liner to access and visually inspect the flexible intake snorkel. Squeeze it to check for soft, crushed, or delaminated sections. A YouTube video by user 'RAM Central' documents this exact failure and fix. Another video by 'Semi & Auto Medic' shows the hose completely collapsed on itself.
   Typical fix: Remove the collapsed section of the intake tubing. Many owners simply discard the collapsed portion rather than replacing the entire assembly, as the primary air inlet remains functional.
   Est. part cost: $0-$150
3. Severely Clogged Air Filter (Dirt/Debris) 🟡 Medium Probability Operating in dusty or dirty environments (e.g., farms, construction sites) can clog the air filter much faster than the normal service interval.
   How to confirm: Visually inspect the air filter. It will be heavily contaminated with dirt, dust, or other debris, blocking light when held up to a source.
   Typical fix: Replace the engine air filter.
   Est. part cost: $30-$80

Rare But Worth Checking

• Debris Blocking Air Inlet: In some cases, foreign objects like snow, leaves, or even a plastic bag can get sucked into the air intake snorkel, causing a sudden restriction. Birds have also been known to build nests inside the airbox, which get sucked into the filter area when the Active Air door opens.
• Disconnected Active Air Door Linkage: The Ram Active Air box has an internal door to switch between the front and fender air inlets. A small plastic linkage controls this door. If it becomes disconnected, the door can get stuck in a position that restricts airflow, triggering P2280 even with a clean filter. This was demonstrated in a repair video by 'American Diesel Tech'.
• Faulty PCM Software: Ram has issued software updates (e.g., TSBs #1813022REVA, #18-092-17) that can make the P2280 code less sensitive by changing it from a one-trip to a two-trip fault. If physical parts are all confirmed to be good, ensuring the truck's PCM is updated is a valid next step.

Diagnosis Steps

1. Turn the ignition off.
2. Open the air filter housing and perform a thorough visual inspection of the engine air filter.
3. Check for heavy dirt accumulation or signs of oil saturation (dark, greasy patches).
4. If the filter is oil-soaked, the primary cause is a clogged CCV filter. Plan to replace both the air filter and the CCV filter kit.
5. If the filter is just dirty, replace the air filter and clear the code.
6. If the filter is clean, inspect the entire air intake tract. Check the internal 'Active Air' door inside the airbox to ensure its linkage is connected and it moves freely.
7. If the airbox internals are good, proceed to inspect the intake snorkel routed inside the driver's side fender well. This requires removing the fender liner. Check for an internally collapsed hose.
8. Clear any debris found in the intake path.
9. After performing repairs, clear the DTC and perform a test drive to ensure the code does not return. A specific procedure to reset the 'Perform Service' message involves turning the key on, pressing the brake twice, then slowly pressing the accelerator twice within 10 seconds, then turning the key off.

Parts You'll Likely Need

• Crankcase Ventilation (CCV) Filter Kit (OEM #68002433AC) — This is the root cause of the common oil-soaked air filter problem that triggers P2280. It is a required maintenance item with a service interval of ~67,500 miles.
  Trusted brands: Mopar (68002433AC), Fleetguard (CV52001)
  OEM price range: $100-$150
  Aftermarket price range: $80-$120
• Engine Air Filter (OEM #53034051AB) — This is the part that becomes restricted by either dirt or oil, directly causing the code. It must be replaced as part of the repair.
  Trusted brands: Mopar, Fleetguard, Wix, Fram
  OEM price range: $50-$80
  Aftermarket price range: $30-$60

Technical Service Bulletins (TSBs) & Recalls

• TSB #9003821: An internal document number that addresses the factory CCV system causing oil to saturate the air filter, leading to a restriction.
• TSB #1813022REVA / #18-092-17 / etc: Various software updates to revise the sensitivity of the P2280 fault detection.
• TSB Bulletin #1802321: Notes that the P2280 code for air flow restriction/leak has been changed from a one-trip fault to a two-trip fault.
• TSB Bulletin #1801517: A manufacturer bulletin indicating that P2280 is now classified as a two-trip fault to reduce false or premature triggers.
• TSB Bulletin #18-015-17 REV. A: Confirms software revisions where P2280 (Air Flow Restriction / Leak Between Air Cleaner And MAF) is updated to a two-trip fault status.

Platform-Specific Known Issues

• A technical service bulletin (TSB #9003821) has been noted by some sources, documenting the issue of the CCV system causing oil saturation of the air filter. This appears to be an internal dealer reference number rather than a public TSB.
• Multiple software update TSBs exist to make the P2280 logic less sensitive, including #1813022REVA, #1800322, #18-092-17, and #18-015-17 Rev A.

Mechanic-Grade Diagnostic Values

• Mass Air Flow (MAF) Sensor Reading at Idle — expected: 5-10 g/s (grams per second). Failure: A reading consistently below 5 g/s at idle can indicate a restriction upstream of the sensor. One technician noted a faulty MAF under-reporting by 3-5 g/s at idle.
🎬 Watch: A technician's guide to diagnosing airflow restriction codes.
• Inlet Air Pressure Sensor Reading — expected: The PCM expects to see a relatively stable air pressure reading from the sensor on the airbox.. Failure: A rapid decrease in pressure detected by the Inlet Air Pressure Sensor will trigger the P2280 code.

Scan Tool Commands That Help

• wiTECH (OEM Chrysler/Ram Tool): Active Airbox Actuator Calibration/Relearn — Use this function after servicing or replacing the Active Air system actuator or linkage to ensure the PCM learns the correct vane positions. It can also be used to test the actuator's movement during diagnosis.
• wiTECH (OEM Chrysler/Ram Tool): PCM Configuration Routine — This routine should be performed after a PCM software flash or replacement to ensure all modules are correctly configured with the vehicle's equipment.

Wiring & Ground Locations

• MAF Sensor Connector — On the air intake tube, just after the air filter housing.. While the sensor itself is rarely the cause, damage or corrosion to its connector or wiring can cause faulty readings. A plastic anchor holding the harness to the airbox lid should be checked.
• Ram Active Air Actuator Connector — On the side of the air filter housing, near the bottom.. A bad connection here can prevent the Active Air door from moving, causing it to get stuck in a restrictive position and triggering P2280.
• Engine/Chassis Grounds — Key grounds are located near the battery negative terminal, from the firewall to the back of the cylinder head, and on the fender near the battery.. A poor ground connection for the PCM or related sensors can cause erratic sensor readings, potentially leading to false codes like P2280.
• Inlet Air Pressure Sensor — Located on the airbox itself, this sensor directly measures pressure to detect restrictions.. This is the primary sensor that triggers the P2280 code when it detects a rapid pressure drop, indicating a clogged filter or blocked intake path.

Real Owner Repair Stories

• YouTube user 'American Diesel Tech' (2018 Ram 5500 6.7L Cummins) — Check Engine Light, 'Service Air Filter' message, P2280 code, and low mass airflow readings on a scan tool.
  ❌ Tried (didn't work) Visual inspection of the air filter, which was not excessively dirty.
  ✅ What actually fixed it The linkage for the Ram Active Air door inside the airbox had become disconnected. Reconnecting the linkage restored proper door function and normal mass airflow readings, clearing the code.
• YouTube user 'Semi & Auto Medic' (2013 Ram 6.7L Cummins) — 'Service Air Filter' message, severe limp mode limited to 5 mph, and multiple codes including P1507.
  ❌ Tried (didn't work) Initial assumption was a failed CCV filter or other major component.
  ✅ What actually fixed it The flexible, paper-like intake snorkel inside the driver's side fender had completely collapsed on itself, blocking all air from the secondary inlet. The owner cut away the collapsed portion of the hose, which resolved all symptoms and codes.
• Turbo Diesel Register Forum user '2013megacab' (2013+ Ram 6.7L Cummins) — 'Service air filter' message and P2280 code.
  ❌ Tried (didn't work) Cleaning plastic film off of a relatively clean-looking air filter. The problem returned.
  ✅ What actually fixed it A technician informed the owner of a TSB related to the issue. The official fix per the TSB was to simply remove the collapsible intake hose from the fender well.

OEM Part Supersession History

• 68002433AB → 68002433AC — Standard part revision update by Mopar.
  Heads up: The parts are interchangeable. 68002433AC is the current part number for the CCV filter kit for 2007.5-2024 models.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Death Wobble 🔴 High — Can occur at any mileage, often triggered by worn steering/suspension components like the track bar, ball joints, or tie rod ends. More common on lifted trucks or with larger tires.
• EGR Cooler Failure 🔴 High — Common issue where the cooler cracks internally, leading to coolant loss, white smoke from the exhaust, and potential engine overheating. Often misdiagnosed as a head gasket failure. A failed cooler can also cause frequent DPF regens.
• VGT Turbo Actuator Failure 🟠 Medium — A very common failure point, often caused by soot buildup inside the turbo restricting movement. Symptoms include loss of power, poor throttle response, and a non-functional exhaust brake. Triggers codes like U010C, P00AF, and P003A. (Ref: Warranty Extension X99 (NHTSA ID 10208985) extends the warranty for the turbocharger actuator to 15 years/150,000 miles for some 2015 models.)
• Blown Head Gasket 🟠 Medium — More common on the 6.7L than the preceding 5.9L, especially on tuned engines or those that have experienced overheating, often as a result of EGR cooler failure.
• Water Pump Failure 🟡 Low — Considered a wear-and-tear item, but failures can lead to overheating. Symptoms include coolant leaks from the front of the engine.
• Cracked Exhaust Manifold 🟡 Low — Stock manifolds can crack due to heat cycles, causing exhaust leaks that manifest as a ticking noise, especially when the engine is cold.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific code, a used part is a smart choice only for the main airbox assembly or the plastic intake snorkel if they are physically cracked or broken. Since the common failures are a collapsed snorkel (which can be trimmed for free) or a disconnected internal linkage (which can be reconnected), even these parts are often repairable without replacement. A used airbox from a donor vehicle is a viable option if the original is damaged beyond repair.

Donor-vehicle mileage cap: roughly under 150000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For an airbox assembly, check for cracks, especially around mounting points.
• Ensure the internal Active Air door and its linkage are present and move freely.
• Verify the actuator motor connector is not broken.
• If sourcing the fender snorkel, ensure it is not made of the collapsible paper-like material or has already been replaced with a more robust version.

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

• Crankcase Ventilation (CCV) Filter: This is a critical maintenance item. Always buy new from Mopar or a reputable OEM supplier like Fleetguard to ensure proper filtration and service life.
• Engine Air Filter: This is a consumable part. Never use a used air filter.

Aftermarket brands forum-validated for this vehicle:

• Fleetguard (CV52001): This is the OEM supplier for the CCV filter and is considered equivalent to Mopar.
• S&B, aFe, Banks Power: These brands are well-regarded for complete cold air intake systems if you choose to upgrade the entire assembly.

Brands owners have reported issues with on this vehicle:

• Oiled Air Filters: Some experts recommend avoiding oiled aftermarket air filters as the oil can contaminate sensors downstream, although this is less of a direct cause for P2280.
• Unbranded/Chinese Knockoff Sensors: If any sensors like the MAP or Inlet Pressure sensor are suspected, avoid cheap unbranded replacements as they are known to be unreliable.

Real Owner Stories

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

Related OBD-II Codes

• P00AF — Indicates a VGT turbo actuator issue, a very common failure on this engine. It can cause symptoms of power loss and poor response that overlap with P2280.
• P003A — Another common code for a failing VGT turbo actuator. Soot buildup causing this fault can affect overall engine breathing, similar to the air restriction of P2280.
• U010C — Code for 'Lost Communication with Turbocharger/Supercharger Control Module A'. This is frequently triggered by the common VGT turbo actuator failure on the 6.7L Cummins, which shares symptoms with P2280.
• P2463 — Indicates 'Diesel Particulate Filter Restriction - Soot Accumulation'. A severe air intake restriction from P2280 can lead to an inefficient burn and excessive soot, causing more frequent DPF regeneration cycles and potentially clogging the DPF.

Frequently Asked Questions