P1167 on Honda
Air/Fuel Ratio Sensor 1 Heater System Malfunction
P1167 on Honda vehicles indicates air/fuel ratio sensor 1 heater system malfunction. Au7o has documented this code across 1 Honda model — most commonly on Civic. A manufacturer-specific code used by Honda and Acura for a fault in the heater circuit of the upstream wideband air/fuel ratio sensor (bank 1, sensor 1). That sensor has to reach operating temperature quickly for the PCM to control the fuel mixture accurately; when the PCM commands the heater on and the circuit's current or resistance stays out of range, it sets this code. Expect the check engine light, possibly slightly reduced fuel economy, and an emissions test failure. Other manufacturers reuse P1167 for unrelated concerns, so confirm the make before diagnosing. Typical repair costs on Honda range from $250 to $700, depending on the specific model and root cause.
Common Causes of P1167
- •Failed air/fuel ratio sensor heater element (sensor replacement)
- •Blown air/fuel sensor heater fuse
- •Damaged, melted or chafed sensor wiring near the exhaust
- •Corroded or loose sensor connector
- •Open or shorted heater power feed / ground circuit
- •Poor engine ground causing excessive voltage drop
- •Faulty PCM heater driver circuit (rare)
P1167 on Honda by Model
Honda Civic(1 issue)
- Cracked cast-iron exhaust manifold near the oxygen sensor1996-1999
The stock cast-iron exhaust manifold on sixth-generation (96-00) Civics is prone to heat-cycle cracking, typically right next to the front oxygen sensor. On SOHC D16Y7/Y8 cars the catalytic converter is integrated into the manifold, so the crack lets outside air reach the O2 sensor, skewing fuel trim and triggering rich/lean plus catalyst-efficiency codes, along with a ticking/exhaust-leak noise.
Looking for P1167 on a different make?
View P1167 across all makes →Frequently Asked Questions
What does P1167 mean on Honda?▼
P1167 stands for "Air/Fuel Ratio Sensor 1 Heater System Malfunction." A manufacturer-specific code used by Honda and Acura for a fault in the heater circuit of the upstream wideband air/fuel ratio sensor (bank 1, sensor 1). That sensor has to reach operating temperature quickly for the PCM to control the fuel mixture accurately; when the PCM commands the heater on and the circuit's current or resistance stays out of range, it sets this code. Expect the check engine light, possibly slightly reduced fuel economy, and an emissions test failure. Other manufacturers reuse P1167 for unrelated concerns, so confirm the make before diagnosing. On Honda specifically, this code is documented across 1 model.
What causes P1167 on Honda vehicles?▼
Common causes on Honda: Failed air/fuel ratio sensor heater element (sensor replacement), Blown air/fuel sensor heater fuse, Damaged, melted or chafed sensor wiring near the exhaust, Corroded or loose sensor connector, Open or shorted heater power feed / ground circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1167 on a Honda?▼
Repair costs on Honda range from $250 to $700, depending on the specific model and root cause.
Which Honda models have P1167 documented?▼
Au7o has documented P1167 on 1 Honda model: Civic.