P0171 on a Honda CR-V
P0171 means system Too Lean (Bank 1). On the CR-V, a few causes come up far more than others.
What P0171 usually means on a CR-V
P0171 shows the CR-V adding fuel to correct a lean mixture. On naturally aspirated K24s a vacuum or PCV leak and a dirty MAF are the usual causes; on the 1.5T, a loose charge pipe after the turbo adds to the list. It often shows as a rough cold idle with fuel trims climbing well into positive double digits. A smoke test quickly finds most leaks.
Most common causes on the CR-V
- Vacuum or PCV leak
Cracked hoses are the leading lean cause on higher-mileage CR-Vs.
- Dirty MAF sensor
A contaminated MAF under-reports air and drives trims lean.
- Charge-pipe or intake leak (1.5T)
A loose intercooler pipe bleeds metered air after the sensor.
- Weak fuel delivery
A failing pump or clogged filter starves the engine under load.
What P0171 costs to fix on a CR-V
Most CR-V lean codes are cheap fixes - a thirty-dollar hose or a MAF cleaning - but a smoke test is the smart first spend to find the leak. A MAF sensor is a moderate part and a quick swap. Fuel-pump faults are the costlier, rarer cause.
Year, engine and mileage change the answer. Start a case and Redline weighs these causes against what your car shows, then names the check that would settle it.
Other codes on the Honda CR-V
Related symptoms
Honda CR-V problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0171 behavior is covered on the main P0171 page. Confirm with a scan tool before buying parts.
P0171 on your CR-V?
Every problem becomes a Case. Tell Redline what your CR-V is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.