Trouble codes › By vehicle › Honda CR-V
Common check-engine codes on the Honda CR-V
2007-2022
The CR-V's codes are mostly the usual wear items. On 2017-2019 models with the 1.5L turbo, fuel diluting the engine oil in cold weather was a known issue Honda addressed with software updates and an extended warranty in some states.
Most common: P0420, P0171, P0300, P0456, P0141.
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P0420 means the catalytic converter on bank 1 isn't cleaning the exhaust well enough, usually a worn converter, an exhaust leak or a lazy oxygen sensor.
On the Honda CR-V: Catalyst efficiency at higher mileage; check for misfires and exhaust leaks first.
P0420: causes, can I keep driving, and what to check first →
P0171 System Too Lean (Bank 1)
P0171 means bank 1 is running lean (too much air or too little fuel), most often from a vacuum leak or a dirty MAF sensor.
On the Honda CR-V: Lean: vacuum leaks or an aging air-fuel sensor.
P0171: causes, can I keep driving, and what to check first →
P0300 Random/Multiple Cylinder Misfire Detected
P0300 means the engine is misfiring in more than one cylinder, often from worn plugs or coils, a vacuum leak or low fuel pressure.
On the Honda CR-V: Misfires: spark plugs and coils at their interval; on the 2.4L, valve clearance adjustment is part of the maintenance schedule and can cause misfires when it's out.
P0300: causes, can I keep driving, and what to check first →
P0456 Evaporative Emission System Leak Detected (Very Small Leak)
P0456 means the EVAP system has a very small leak, often a gas cap that isn't sealing perfectly.
On the Honda CR-V: Very small EVAP leaks: start with the gas cap.
P0456: causes, can I keep driving, and what to check first →
P0141 O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0141 means the heater in bank 1's rear oxygen sensor isn't working, usually burned out or missing power.
On the Honda CR-V: Rear oxygen sensor heater: usually the sensor at higher mileage.
P0141: causes, can I keep driving, and what to check first →
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Common codes and known problems as widely reported for these model years; your vehicle may differ. Check nhtsa.gov/recalls and ask a dealer about service bulletins for your VIN, and confirm in your service information.