What Does P0174 Mean on Your 2022 Jeep Compass?
A P0174 code on your 2022 Jeep Compass means that Bank 2 of the 2.4L Tigershark four-cylinder engine is running too lean. Note that on a four-cylinder engine, P0174 is less common since most inline-fours only have one bank. If your Compass has set this code, it may indicate a generalized lean condition that the PCM is attributing to Bank 2 fuel trims.
Symptoms You Might Notice
- Check engine light illuminated
- Rough or unsteady idle
- Hesitation during acceleration
- Reduced fuel economy
- Engine stalling, especially at stops
- Hissing sound from under the hood
Common Causes of P0174 on the 2022 Compass
The 2.4L Tigershark engine uses a MultiAir intake valve control system, which adds complexity:
- Vacuum Leak — Cracked intake hoses, a leaking intake manifold gasket, or a failed PCV valve. The MultiAir system has additional vacuum connections that can develop leaks.
- MAF or MAP Sensor Issue — A contaminated or failing airflow sensor gives the PCM incorrect data, resulting in a lean fuel mixture.
- Fuel Pump or Pressure Regulator — A weakening fuel pump or faulty pressure regulator can cause low fuel pressure system-wide.
- MultiAir System Leak — The oil-hydraulic MultiAir intake system can develop leaks that affect valve timing and air metering.
How to Diagnose the Problem
- Scan for all stored and pending codes — check for MultiAir-related codes as well.
- Monitor fuel trims with a live data scanner. LTFT above +10% confirms lean running.
- Inspect all vacuum hoses, intake gaskets, and MultiAir solenoid connections.
- Smoke test the intake system for hidden leaks.
- Test fuel pressure — the 2.4L Tigershark should read 50-58 PSI at idle.
- Inspect MultiAir actuator for oil leaks.
Repair Options and Estimated Costs
- Vacuum leak repair: $80–$300. Hose and gasket replacement is affordable.
- MAF/MAP sensor replacement: $100–$250. Easy DIY repair.
- Fuel pump replacement: $350–$650 with labor.
- MultiAir actuator repair: $300–$700. Requires professional service.
Can You Still Drive?
Short-distance driving is okay, but get the issue diagnosed soon. A lean condition stresses the catalytic converter and can lead to misfires if left unaddressed.
Prevention Tips
- Follow Jeep's maintenance schedule for oil changes — the MultiAir system relies on clean engine oil.
- Replace the air filter on schedule.
- Use quality fuel from reputable stations.
- Inspect vacuum connections during oil changes.
- Address check engine lights early to prevent secondary damage.