P1167 — Air/Fuel Ratio (A/F) Sensor (Sensor 1) Heater System Malfunction
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P1167 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1167 means on specific makes
Honda / Acura CAUTION
The A/F sensor heater system is malfunctioning — closely related to P1166 and very commonly sets with it. Indicates the upstream sensor isn't being kept hot enough to read accurately.
- Failed upstream A/F sensor ($90-250)
- Heater fuse/relay
- Wiring/connector
Check first: When P1166 and P1167 appear together, the A/F sensor itself is the typical fix. Confirm fuse and connector first.
Source: hondacodes.wordpress.com, 2carpros.com/questions/code-p1167