Honda Pilot TOP 10 DTC Codes You Should Know
Check out the Top 10 DTC Codes that every Honda Pilot owner should be familiar with. Understanding these diagnostic trouble codes will assist you in identifying possible issues and keeping your car operating smoothly. This thorough list covers the most prevalent DTC codes for the Honda Pilot, from engine misfires to fuel systems.
HONDA PILOT TOP 10 DTC
DTC P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
Description: The Powertrain Control Module (PCM) monitors the efficiency of the catalytic converter using oxygen sensors. This code indicates that the catalytic converter’s efficiency has fallen below the allowable threshold.
Cause: Damaged or faulty catalytic converter, oxygen sensor failure, exhaust leak, or poor fuel quality.
Symptoms: Decreased fuel efficiency, poor engine performance, check engine light illuminated, and failed emissions test.
Location of Fault: Exhaust system, specifically the catalytic converter and oxygen sensors in Bank 1.
DTC P0300 – Random/Multiple Cylinder Misfire Detected
Description: This code indicates that the PCM has detected random or multiple-cylinder misfires in the engine.
Cause: Ignition system issues, fuel system problems, vacuum leaks, or faulty sensors.
Symptoms: Rough idle, engine hesitation, decreased fuel efficiency, check engine light illuminated, and poor engine performance.
Location of Fault: Ignition system, fuel system, or vacuum system.
DTC P0301, P0302, P0303, P0304 – Cylinder Misfire Detected (Cylinder 1, 2, 3, and 4 respectively)
Description: These codes indicate that the PCM has detected a misfire in the corresponding cylinder.
Cause: Ignition system issues, fuel system problems, vacuum leaks, or faulty sensors.
Symptoms: Rough idle, engine hesitation, decreased fuel efficiency, check engine light illuminated, and poor engine performance.
Location of Fault: Ignition system, fuel system, or vacuum system corresponding to the specific cylinder.
DTC P0171 – System Too Lean (Bank 1)
Description: This code indicates that the air-fuel mixture in Bank 1 of the engine is too lean, meaning there is too much air and not enough fuel.
Cause: Vacuum leaks, faulty oxygen sensor, malfunctioning fuel injectors, or restricted fuel filter.
Symptoms: Rough idle, engine hesitation, decreased fuel efficiency, check engine light illuminated, and poor engine performance.
Location of Fault: Fuel system, oxygen sensor, or vacuum system in Bank 1.
DTC P0174 – System Too Lean (Bank 2)
Description: This code indicates that the air-fuel mixture in Bank 2 of the engine is too lean, meaning there is too much air and not enough fuel.
Cause: Vacuum leaks, faulty oxygen sensor, malfunctioning fuel injectors, or restricted fuel filter.
Symptoms: Rough idle, engine hesitation, decreased fuel efficiency, check engine light illuminated, and poor engine performance.
Location of Fault: Fuel system, oxygen sensor, or vacuum system in Bank 2.
DTC P0134 – Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
Description: This code indicates that the PCM is not receiving a signal from the oxygen sensor in Bank 1 Sensor 1.
Cause: Faulty oxygen sensor, wiring issues, or a damaged connector.
Symptoms: Poor engine performance, increased emissions, and check engine light illuminated.
Location of Fault: Oxygen sensor wiring or connector in Bank 1 Sensor 1.
DTC P0135 – Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
Description: This code indicates a malfunction in the oxygen sensor’s heater circuit in Bank 1 Sensor 1.
Cause: Faulty oxygen sensor, wiring issues, or a damaged connector.
Symptoms: Poor engine performance, increased emissions, and check engine light illuminated.
Location of Fault: Oxygen sensor wiring or connector in Bank 1 Sensor 1.
DTC P0141 – Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
Description: This code indicates a malfunction in the oxygen sensor’s heater circuit in Bank 1 Sensor 2.
Cause: Faulty oxygen sensor, wiring issues, or a damaged connector.
Symptoms: Poor engine performance, increased emissions, and check engine light illuminated.
Location of Fault: Oxygen sensor wiring or connector in Bank 1 Sensor 2.
DTC P0455 – Evaporative Emission Control System Leak Detected (Gross Leak)
Description: This code indicates a large leak has been detected in the evaporative emission control system (EVAP).
Cause: Loose or damaged gas cap, faulty purge valve, damaged or cracked hoses, or faulty EVAP vent valve.
Symptoms: Check engine light illuminated, fuel odor, and potential failed emissions test.
Location of Fault: Fuel system, specifically the evaporative emission control system components.
DTC P0497 – Evaporative Emission System Low Purge Flow
Description: This code indicates that the PCM has detected insufficient purge flow in the evaporative emission control system (EVAP).
Cause: Faulty purge valve, damaged or cracked hoses, or a clogged charcoal canister.
Symptoms: Check engine light illuminated and potential failed emissions test.
Location of Fault: Fuel system, specifically the evaporative emission control system components.
WORDS FROM ME
knowing the Top 10 DTC Codes for your Honda Pilot is crucial in ensuring your vehicle’s optimal performance and avoiding potential problems down the road. By familiarizing yourself with these common diagnostic trouble codes, you can take proactive measures to address any issues that may arise and keep your Honda Pilot running smoothly. Stay ahead of the game and equip yourself with the knowledge you need to keep your Honda Pilot in top condition.