P0175 Code: Dodge Durango (2021-2024) - Causes, Symptoms & Fixes

P0175 on a 2021-2024 Dodge Durango: Comprehensive diagnostic guide

Important data note (data limitations)

• The real NHTSA data you provided shows: No NHTSA complaints for this make/model/year/issue combination and No recalls found in NHTSA database.
• Because there are no official complaints or recalls in the data, this guide relies on general automotive knowledge and common diagnostic practices for P0175 (Bank 2 System Too Rich) as it applies to Dodge Durango engines. Use this as a structured diagnostic path, not as a replacement for model-specific service bulletins or recalls that may exist outside the provided data.

CODE MEANING AND SEVERITY

• What P0175 means: P0175 stands for System Too Rich (Bank 2). The engine control unit (ECU) has detected that the long-term fuel trim (LTFT) for Bank 2 is too high, indicating the engine is running richer (more fuel) than commanded for an extended period. Bank 2 refers to one side of the V-engine; in a Durango with a V6 or V8, there are two banks.
• Severity and potential consequences: Moderate to high. Persistent over-fueling can cause poor fuel economy, rough running, catalyst heating or damage, misfires, and eventual exhaust catalyst wear. Short-term limp conditions are possible if the fuel trim is severe, but many vehicles will tolerate a temporary condition while the PCM adapts. If you also see related codes (e.g., P0171 or P0174 indicating lean conditions on the other bank), investigate possible balance reasons (air leaks, sensor faults, fuel delivery issues).

COMMON CAUSES ON DODGE DURANGO

Typical causes that can trigger P0175 on a Durango (Bank 2) include:

• Vacuum or unmetered air leaks on Bank 2 side
  • Leaky or disconnected vacuum hoses, cracked intake manifold gaskets, PCV system leaks, or cracked throttle body gaskets.
• Faulty or dirty air measurement sensors
  • MAF sensor (dirty or failing) or a dirty intake (MAP/MAP sensor in some configurations) leading to incorrect air-fuel calculations.
• Faulty oxygen sensor(s) on Bank 2
  • Upstream (sensor before the catalytic converter) or downstream (sensor after the cat). A failing O2 sensor can report incorrect fuel trim and drive the trim calculation out of limit.
• Fuel delivery or injector issues on Bank 2
  • Stuck or leaking fuel injector(s) on Bank 2, clogged injectors, or an over-fueling condition due to regulator/pump issues.
• Fuel pressure issues
  • Over-fueling can result from abnormally high fuel pressure due to a faulty fuel pressure regulator, failing returnless system controls, or a weak/errant fuel pressure sensor.
• PCV system problems
  • Stuck PCV valve or leaky PCV plumbing leading to additional unmetered air or fuel-trim faults.
• Exhaust or evap leaks that affect sensor readings
  • Exhaust leaks before an O2 sensor or evap system leaks can confuse sensor data and fuel trim behavior.
• Wiring or connector issues
  • Damaged or corroded wiring to the O2 sensor(s), MAF, or fuel injectors can cause intermittent signals and abnormal trims.
• Less common but possible
  • ECU/PCM update or intermittent calibration issue (rare, and not a substitute for hardware fault resolution).

SYMPTOMS

• Check Engine Light (CEL) or MIL illuminated.
• Rough idle, hesitation, or misfire symptoms, especially at steady cruise.
• Increased fuel consumption or noticeably lower fuel economy.
• Diminished engine power or poor acceleration, particularly under load.
• Possible slight exhaust odor if rich operation persists.
• In some cases, no obvious symptoms beyond the MIL and abnormal fuel trims.

DIAGNOSTIC STEPS

A structured approach to diagnose P0175 on a 2021-2024 Durango:

Step 1: Confirm the code and data

• Use an OBD-II scanner to confirm P0175 code and pull freeze frame data.
• Note any accompanying codes (P0171, P0174, P0300, etc.) and engine load, RPM, fuel trims, and operating temperature at the time of fault.

Step 2: Check for other related codes

• If P0175 appears with P0171/P0174 (lean conditions on Bank 1/Bank 2), suspect a shared air intake issue or systemic fuel delivery problem.

Step 3: Inspect for obvious air leaks on Bank 2

• Visually inspect vacuum hoses, intake manifold gaskets, throttle body gasket, PCV hoses, and connectors on the Bank 2 side.
• Use a smoke machine or a propane/engine spray test at suspected leak points while watching RPM changes to locate vacuum leaks.

Step 4: Inspect and test MAF and air intake

• Remove and inspect the MAF sensor. Clean with a dedicated MAF cleaner if dirty; do not use other cleaners.
• Check for intake leaks after the MAF sensor (intake plenum, throttle body connections). Replace/repair as needed.
• If equipped with a MAP sensor (or alternative air measurement sensor), test readings for abnormal values.

Step 5: Check Bank 2 O2 sensor(s)

• Compare Bank 2 upstream O2 sensor readings to expected dynamic response versus Bank 1 upstream sensor. Look for sensor sticking, slow response, or flatlining.
• If you see abnormal readings or a faulty sensor is suspected, perform a sensor swap (prefer OEM or high-quality equivalents) and clear codes to test.

Step 6: Inspect and test fuel delivery

• Check fuel pressure with a proper gauge to ensure it meets the Durango’s spec for the engine variant (3.6L, 5.7L, or other). Compare with service manual values.
• If fuel pressure is high or fluctuating, inspect fuel pressure regulator and related fuel system components.
• If fuel trims improve after revving or load changes, it can indicate fuel delivery or air metering issues.

Step 7: Inspect Bank 2 fuel injectors

• Listen for a leaking injector sound, test balance/flow between Bank 2 injectors if service equipment is available.
• Consider professional injector balance testing or cleaning as needed.

Step 8: Check PCV and Evaporative System

• Inspect PCV valve and hoses; replace if sticky or clogged.
• Inspect EVAP system hoses/seals for leaks; replace any damaged components.

Step 9: Check for exhaust leaks or sensor wiring issues

• Inspect piping for leaks near Bank 2 O2 sensors, especially before the sensor.
• Inspect wiring harnesses and connectors to the Bank 2 O2 sensor(s) and the MAF sensor for damage or corrosion.

Step 10: Clear codes and re-test

• After performing the above checks and performing any replacements, clear codes and test drive under varied loads to see if P0175 returns and if LTFT/STFT for Bank 2 stabilize within normal limits.

Step 11: Special considerations if the problem persists

• If LTFT remains high on Bank 2 despite clean sensors and no leaks, consider diagnosing for a partial exhaust restriction or a more complex fuel system issue. In rare cases, PCM calibration or software updates may be indicated by a dealer.

Data-use note

• Because the provided data shows no NHTSA complaints and no recalls for this combination, the diagnostic approach above reflects common, general causes for P0175 on modern Dodge Durango engines rather than model-specific recall/TSB guidance. If a service bulletin or dealer-specific update exists outside the provided data, consult an authorized dealer for the latest recommendations.

RELATED CODES

• P0171: System Too Lean (Bank 1)
• P0174: System Too Lean (Bank 2) — watch for cross-bank interactions
• P0172: System Too Rich (Bank 1)
• P013x and P0131/P0132 (O2 sensor related)
• P0517, P0456, P1444 etc. (Evap/PCV/System codes that can accompany fuel trim issues)
• P0300-P0306 (Misfire codes that can accompany rich conditions or misfiring due to fueling)

REPAIR OPTIONS AND COSTS (2025 prices)

Notes:

• Prices vary by region, shop, and whether you use OEM or aftermarket parts. The numbers below are broad ranges to help with budgeting.
• Labor times are approximate and can vary by technician and vehicle variant (3.6L V6, 5.7L V8, etc.). Always obtain a formal estimate before work.

Common fixes and estimated costs:

• PCV valve and related hoses: Parts $10–$40; Labor $40–$100; Total $50–$140.
• Vacuum hose repairs or replacing gaskets (intake, throttle body, etc.): Parts $5–$60; Labor $60–$150; Total $65–$210.
• MAF sensor cleaning or replacement:
  • Cleaning: typically free if you DIY; Replacement: Parts $120–$320; Labor $40–$100; Total $160–$420.
• Upstream Bank 2 O2 sensor replacement (pre-cat):
  • Parts $60–$180; Labor $40–$120; Total $100–$300.
• Downstream Bank 2 O2 sensor replacement (post-cat):
  • Parts $60–$200; Labor $40–$120; Total $100–$320.
• Fuel pressure regulator or associated fuel system components:
  • Parts $60–$180; Labor $80–$200; Total $140–$380.
• Fuel pump (if fuel delivery is suspected) or complete fuel rail service:
  • Parts $180–$600 (pump or rail kit); Labor $150–$400; Total $330–$1000+.
• Fuel injector replacement or cleaning (Bank 2 injectors):
  • Cleaning/diagnostic service: $40–$120.
  • Per-injector replacement: $80–$180 per injector; Bank 2 package (assuming 2 injectors): $160–$360 plus labor $80–$200.
  • Full bank injector replacement could range $400–$1200 depending on parts and labor.
• Intake manifold gasket replacement (if leak suspected on Bank 2 side):
  • Parts $100–$350; Labor $350–$900; Total $450–$1250.
• Throttle body replacement (or gasket service):
  • Parts $180–$350; Labor $80–$180; Total $260–$530.
• ECU/PCM update or reflash (if required per bulletin or dealer):
  • $0–$300 depending on warranty and if it’s a no-charge update at dealer.

Budget planning notes:

• If multiple components are suspected (e.g., MAF, vacuum leaks, and O2 sensors), total costs can rise quickly toward the higher end of the ranges.
• DIY-friendly tasks (PCV, basic vacuum hose replacement, MAF cleaning) can reduce costs significantly but may require access to a quality scan tool and the ability to perform tests like fuel pressure checks.

DIY vs PROFESSIONAL

DIY-friendly steps (cost-saving, but requires basic tools and safety awareness):

• Inspect for obvious vacuum leaks and damaged hoses; replace as needed.
• Clean the MAF sensor (using proper MAF cleaner) and recheck performance.
• Check gas cap seal and EVAP vent hoses for leaks.
• Retrieve live data with an OBD-II scanner to observe LTFT/STFT behavior yourself, compare Bank 2 data to Bank 1.
• Clean or replace PCV valve if it’s easily accessible and inspect hoses.
• Re-set the ECU adaptations after repairs to verify if the issue reoccurs.

Professional steps (recommended when you lack tools or the problem persists):

• Accurate fuel pressure test (bench test and pressure readings at different engine loads).
• Diagnostic testing of O2 sensors with a lab-grade scan tool and, if needed, replacement of faulty sensors.
• Injector balance tests and flow checks.
• Smoke testing for vacuum leaks and a thorough EVAP system check.
• Possible ECU reflash or calibration if indicated by a service bulletin or dealer diagnostic.

PREVENTION

• Use high-quality fuel and avoid long-term use of low-octane, poor-quality fuels.
• Address vacuum leaks promptly; replace cracked hoses, cracked intake gaskets, or PCV components as needed.
• Keep air intake components clean; replace air filter at recommended intervals.
• Regularly service the MAF sensor (clean rather than replace when possible) and replace if failing.
• Monitor and replace O2 sensors per intervals or when diagnostics indicate failure; avoid driving with faulty sensors.
• Ensure fuel delivery components (pump, regulator, and injectors) are functioning correctly; address rough or fluctuating fuel pressure quickly.
• Avoid short trips that do not allow the engine to reach operating temperature; extended driving helps combustion stability and sensor accuracy.
• If a vehicle model-specific service bulletin or update exists, have it performed by a dealer or qualified shop.
• Maintain proper PCV function; replace as needed to prevent unmetered air or oil contamination in the intake.

Final notes

• The Dodge Durango 2021–2024 platform may vary by engine family (e.g., 3.6L V6, 5.7L Hemi, etc.). While the P0175 diagnosis focuses on Bank 2, you should also consider cross-bank interactions (Bank 1 vs Bank 2) if multiple fuel trim or sensor data suggest a broader issue.
• If you’re unsure or uncomfortable with high-pressure fuel systems, O2 sensor diagnostics, or injector work, seek a qualified technician. Fuel system work carries safety risks and requires proper tools and procedures.