What P0171 means for your Ridgeline
The Honda Ridgeline uses the same 3.5L J35 V6 as the Pilot and Odyssey, and it shares the same Bank 1 lean code pattern: the rear PCV port grommet cracks past 100k miles and creates a wide-open vacuum leak. The grommet is a $5 fix. If the grommet looks good, suspect the intake manifold gasket, which weeps unmetered air after 130k miles on the J35.
🎯 Top Causes on the Honda Ridgeline
🚚 Most Affected Ridgeline Model Years
| Year | Engine | Trim | Typical Mileage | Notes |
|---|---|---|---|---|
| 2017-2020 | 3.5L J35Y6 V6 | RT, Sport, RTL, RTL-E, Black Edition | 80k-130k | VCM-equipped; PCV grommet and MAF |
| 2006-2014 | 3.5L J35A9 V6 | RT, RTS, RTL | 110k-170k | First-gen; PCV grommet and intake gasket dominant |
| 2009-2014 | 3.5L J35Z (refresh) | RTS, RTL, Sport | 120k-180k | Same J35 pattern |
⚠ Is It Safe to Drive Your Ridgeline with P0171?
A Ridgeline P0171 is not an emergency. Tow loads should be reduced until the leak is repaired - lean conditions under high load shorten catalyst life. Watch for accompanying misfire codes; address those immediately.
🔧 How to Diagnose P0171 on a Honda Ridgeline
- Inspect the rear PCV grommet first. Remove the engine cover, look at the rear of the intake manifold, and inspect the small rubber grommet at the PCV port. Cracked, shrunken, or missing = your fault. Replace with Honda OEM.
- Confirm with LTFT readings. LTFT Bank 1 above +18% at idle, dropping at 2500 RPM, points to vacuum leak. Steady high LTFT at all loads points to MAF or fuel.
- Smoke test for hidden leaks. If the grommet looks intact, smoke-test the intake. Smoke escaping at the manifold-to-head joint = intake gasket. Smoke at hoses = vacuum hose. Smoke at the PCV path = a deeper PCV system issue.
❓ P0171 Honda Ridgeline FAQs
How much does P0171 cost on a Honda Ridgeline?
PCV grommet: $5-$105. Intake gasket: $450-$680. MAF clean: $8 DIY. Most P0171 Ridgelines are the grommet.
Does P0171 affect Ridgeline towing capacity?
It does not change the rated capacity, but you should not tow at maximum capacity with a lean condition active - the catalyst gets stressed quickly.
Are Honda PCV grommets backordered?
Occasionally. If your dealer cannot get the OEM grommet quickly, Hondabay, College Hills Honda, and Bernardi Honda commonly stock the part.
Will a tune-up fix P0171 on a Ridgeline?
No. P0171 is a fueling/air metering code, not an ignition code. A tune-up (plugs, coils) does not address the underlying vacuum leak.