p0134
Easy Fix
Honda · SUVs
O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1
Quick Answer
Error code P0134 on your Honda SUVs means: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
RW1RW3RW5RV1CR-V EX 2024CR-V EX-L 2024CR-V Hybrid Sport 2024CR-V Hybrid Sport Touring 2024CR-V Hybrid Sport-L 2024CR-V LX 2024CR-V Sport 2024CR-V Sport Touring 2024HR-V EX-L 2024HR-V LX 2024HR-V Sport 2024Passport EX-L 2024Passport Sport 2024Passport Touring 2024Passport TrailSport 2024Pilot EX 2024Pilot EX-L 2024Pilot Elite 2024Pilot LX 2024Pilot Touring 2024Pilot TrailSport 2024YG7YA7ZD1RZ1
Likely Causes
How to Fix It
1
Check the O2 sensor heater fuse in the under-hood fuse box; replace if blown
2
Inspect the O2 sensor wiring and connector for damage, corrosion, or rodent damage
3
Monitor Bank 1 Sensor 1 voltage with a scan tool during normal operation; it should oscillate between 0.1V and 0.9V
4
Check for exhaust leaks at the manifold and pipe connections upstream of the sensor
5
Replace the upstream oxygen sensor if the voltage signal is flat or absent
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Upstream oxygen sensor (Bank 1, Sensor 1)
O2 sensor wiring connector
Exhaust manifold gasket
O2 sensor heater fuse
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