← View Generic P0140 Guide
Severity: Medium
🚗
Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
P0140: Oxygen Sensor Circuit No Activity Bank 1 Sensor 2
on 2021 Honda PASSPORT
Fix Cost
$50 - $250
Parts & Labor
Difficulty
2/5
30 mins - 1 hour
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
⚠️
Important for 2021 Honda PASSPORT Owners
Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does P0140 Mean on 2021 Honda PASSPORT?
The downstream oxygen sensor on bank 1 shows no switching activity.
⚠️
Symptoms
- • Failed emissions test
- • check engine light
- • catalytic converter monitoring disabled.
🔍
Common Causes
- • Failed oxygen sensor
- • open wiring circuit
- • no power to sensor
- • completely contaminated sensor.
🛠️
How to Fix P0140 on 2021 Honda PASSPORT
Replace oxygen sensor, repair open circuits, check power supply, inspect for contamination.
🔧
Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
View 2021 Honda PASSPORT SpecsParts for 2021 Honda PASSPORT
Essential Tool
🔗
Related Diagnostic Codes
Other codes that may appear with P0140
P0138
Sequential Code
Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2
Medium
P0139
Sequential Code
Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
Medium
P0141
Sequential Code
Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 2
Medium
P0142
Sequential Code
P0142: Fuel Pressure Regulator Circuit Malfunction
Medium
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system