← View Generic P0155 Guide
Severity: Medium
🚗
Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
P0155: Oxygen Sensor Heater Circuit Malfunction Bank 2 Sensor 1
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 P0155 Mean on 2021 Honda PASSPORT?
The heater circuit for the upstream oxygen sensor on bank 2 is not working.
⚠️
Symptoms
- • Slow fuel control when cold on bank 2
- • poor cold weather performance
- • check engine light.
🔍
Common Causes
- • Blown heater fuse
- • faulty sensor heater
- • wiring problems to heater circuit.
🛠️
How to Fix P0155 on 2021 Honda PASSPORT
Check heater fuse, replace oxygen sensor, repair heater wiring.
🔧
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 P0155
P0150
Same System
Oxygen Sensor Circuit Malfunction Bank 2 Sensor 1
Medium
P0151
Same System
Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 1
Medium
P0152
Same System
Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1
Medium
P0153
Same System
Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1
Medium
P0154
Same System
Oxygen Sensor Circuit No Activity Bank 2 Sensor 1
Medium
P0430
Related Problem
Catalyst System Efficiency Below Threshold Bank 2
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