Honda Tech Tip: Rough Idle and/or DTCs P0171, P0174 or P1171

Honda Tech Tip: Rough Idle and/or DTCs P0171, P0174 or P1171

Select Honda vehicles may experience intermittent rough idle and/or the MIL is on with DTC P0171 (Fuel Trim System Lean Bank 1), P0174 (Fuel Trim System Lean Bank 2) or P1171 (Fuel Trim System Lean During Acceleration). If normal troubleshooting procedures haven’t resolved the problem, it may be caused by a cracked intake manifold gasket(s).

Applies to: All 1998-’99 Passports; 2000 Passport – From VIN 4S6..58W..Y4400001 through VIN 4S6..58W..Y4407271.

The above vehicles may experience intermittent rough idle and/or the MIL is on with DTC P0171 (Fuel Trim System Lean Bank 1), P0174 (Fuel Trim System Lean Bank 2) or P1171 (Fuel Trim System Lean During Acceleration). If normal troubleshooting procedures haven’t resolved the problem, it may be caused by a cracked intake manifold gasket(s).

If this is the case, replace both intake manifold gaskets (P/N 8-97237-538-0).

REPAIR PROCEDURE:
Refer to page 6A-22 of the 1998, 1999 or 2000 Passport Service Manual.
1. Remove the intake manifold from the cylinder heads. Separating the upper and lower intake manifold sections is not necessary.
2. Remove both old intake manifold gaskets. Be sure to carefully remove all of the old gasket material.
3. Install the new intake manifold gaskets.
4. Reinstall the intake manifold with the new EGR valve gasket (P/N 8-97104-317-1) and the new throttle body gasket (1998-’99 models: P/N 8-94389-939-0; 2000 models: P/N 8-97193-729-1).

Technical service bulletin courtesy of Honda Parts Express.

You May Also Like

Myers Tire Supply Introduces MTS Xpresstm

The innovative solution to consolidate purchases and control inventory costs.

Myers Tire Supply has announced the launch of MTS Xpress, a proprietary platform to help customers gain control while consolidating their purchases and streamlining their inventories. 

MTS Xpress from Myers Tire Supply is designed to help customers regain control of their inventory and lower their operating costs.  It is a proprietary inventory management solution connecting the customers’ needs to Myers’ inventory with the help of a downloadable mobile app.  With MTS Xpress, a Myers Tire Supply representative or any authorized customer employee can order an unlimited number of consumables, making sure the right products are on their shelves at the right time.  MTS Xpress will help our customers consolidate their suppliers, reduce purchasing costs by streamlining the entire acquisition process and gain control of their inventory.

Experiencing What the Tool Industry Has to Offer

ETI held its annual ToolTech conference April 17-19 at the Hyatt Regency Tamaya Resort in Santa Ana Pueblo, New Mexico.

Sandia Mountains
LIQUI MOLY Develops Liquid Thermal Manager for EV Batteries

The automotive chemical specialist is expanding its range for all-electric vehicles with Battery Coolant EV 200.

May 2023 Vehicle Care RockStar: Johnny Weber

Johnny Weber exudes confidence in his abilities to lead the band through proficiency over pageantry.

Variable Valve Timing Systems

Variable valve timing systems allow today’s engines to maximize performance and drivability.

Other Posts

Continental Tire Upgrades Test Tracks for EVs

Continental expanded its EV charging infrastructure at three company-owned test sites in Sweden, Germany and the U.S.

Streamlight Names E.A. Langenfeld & Associates 2022 Automotive Sales Rep Agency of the Year

The company received the award yet again in recognition for outstanding national sales achievement.

MAHLE and Midtronics Join Forces for Battery Service 

The goal of the cooperation: holistic battery diagnostics and maintenance from a single source in a growing future market.

Mitchell Announces Data Licensing Agreement with Rivian

Agreement reaffirms Mitchell’s commitment to proper and safe repair as electric vehicle adoption surges.