The OBD code P0174 for Honda indicates a lean condition in bank 2 of the engine.
This code affects the fuel system.
Symptoms include the Check Engine Light on, increased fuel consumption.
Common causes are intake air leaks, faulty oxygen sensor, ignition misfiring, or faulty fuel injectors.
It is a moderate issue.
To fix, inspect and repair any damaged components or wiring related to the possible causes mentioned.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Honda p0174 OBD Code
The vehicle may exhibit a lean condition on Bank 2 of the engine.
- With Honda OBD code P0174, the Engine Light will be ON.
- Excessive Fuel Consumption may be noticed.
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Causes of the Honda p0174 OBD Code
Possible reasons for Honda P0174 include vacuum leaks, faulty MAF sensor, or fuel delivery issues.
- P0174 can be caused by intake air leaks.
- A faulty front heated oxygen sensor.
- Ignition misfiring.
- Faulty fuel injectors.
- Exhaust gas leaks.
- Incorrect fuel pressure.
- Lack of fuel.
- A faulty Mass Air Flow (MAF) sensor.
- Or an incorrect Positive Crankcase Ventilation (PCV) hose connection.
Fixing Honda Error Code p0174 Step By Step
Addressing a lean condition on bank 2 by checking for vacuum leaks and inspecting the intake system.
- To fix Honda OBDII code P0174, start by reviewing the ‘Possible Causes’ mentioned above and visually examining the corresponding wiring harness and connectors.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, perform a thorough inspection of the intake system for any vacuum leaks, especially around the intake manifold gaskets.
- Consider cleaning or replacing the Mass Air Flow (MAF) sensor if it is dirty or faulty.
- Inspect the fuel pressure to ensure it is within the manufacturer’s specifications.
- Finally, reset the Engine Control Module (ECM) and clear the trouble code to see if it returns after the repairs.
Cost Of Fixing Honda p0174 Fault Code
Diagnosing and repairing Honda P0174 typically involves inspecting for vacuum leaks and faulty oxygen sensors.
The cost to diagnose and fix a Honda OBD code P0174 typically ranges from $75 to $150 per hour for labor rates.
With an estimated repair time of 1. 0 hour, the general cost could be around $75 to $150, depending on shop rates and the complexity of the issue.
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Details of the Honda p0174 OBD Code
Code P0174 indicates a lean condition in bank 2 of the engine.
Code P0174 on a Honda indicates a system too lean condition in bank 2. This means that the Engine Control Module (ECM) has detected that the airfuel mixture is too lean on the side of the engine that contains cylinder 2. The ECM monitors the oxygen sensor signals to determine the airfuel ratio, and when it sees a consistently lean condition, it triggers this fault code.
This could be caused by issues such as a vacuum leak, a faulty oxygen sensor, a dirty or clogged fuel injector, or a problem with the fuel pressure.
Mechanic’s Tech Notes
Detailed information on diagnosing and fixing Honda fault code P0174 related to a lean condition in bank 2.
To diagnose Honda OBDII code P0174 (System Too Lean Bank 2), start by checking for vacuum leaks in the intake system, especially around the intake manifold gaskets.
Use a smoke machine or propane torch carefully to pinpoint leaks.
Inspect the Mass Air Flow (MAF) sensor for dirt or contamination.
Test the fuel pressure to ensure it meets specifications.
Check for clogged fuel injectors or a faulty fuel pump.
Use a scan tool to monitor Long Term Fuel Trim (LTFT) values to determine if the engine is running lean.
If all checks out, consider inspecting the oxygen sensor for proper operation.
FAQ
Common causes of OBD code P0174 in a Honda: intake air leaks, faulty front heated oxygen sensor, ignition misfiring, faulty fuel injectors, exhaust gas leaks.
Diagnose P0174 in Honda: Check for intake air leaks, faulty oxygen sensor, misfiring, faulty injectors, exhaust leaks, fuel pressure, MAF sensor, PCV connection. Inspect wiring and connectors.
Address the P0174 code promptly. Continuing to drive may lead to poor fuel economy and potential engine damage. Inspect and repair possible causes mentioned.
Wrap Up
If your Honda triggers OBD code P0174 and you notice poor fuel economy, rough idle, or a lack of power, it may be caused by a vacuum leak, faulty oxygen sensor, or a clogged fuel filter.
To address Honda OBD code P0174, inspect the intake system for leaks, test the oxygen sensor’s performance, and replace the fuel filter if necessary.
Check for any damaged vacuum hoses or connections that could be contributing to the lean fuel mixture.
