What Does P1184 Mean?
The common ground wire for the linear (wide-band) oxygen sensors has an open circuit. This affects all sensors sharing this ground circuit and prevents proper air/fuel ratio control and emissions monitoring.
Safety Warning
Vehicle may run poorly with reduced power and fuel economy. Safe to drive short distances but should be repaired promptly.
Common Causes
45%
Broken or corroded common ground wire connection
30%
Failed ground terminal or connector at ECM or chassis
15%
Damaged wiring harness from corrosion or physical damage
10%
Poor ground connection due to rust or paint at mounting point
Diagnostic Steps
1
Step 1: Locate and inspect the common ground wire connection point for O2 sensors (typically at engine block or chassis)
2
Step 2: Test continuity from each O2 sensor ground pin back to ECM ground and battery negative
3
Step 3: Check for voltage drop across ground circuit while sensors are operating (should be less than 0.1V)
4
Step 4: Inspect all ground terminals and connections for corrosion, looseness, or damage
5
Step 5: Clean or repair ground connection points, replace damaged wiring as necessary
Estimated Repair Cost
$75 - $300
Parts + labor, varies by vehicle and location
The common ground wire for the linear (wide-band) oxygen sensors has an open circuit. This affects all sensors sharing this ground circuit and prevents proper air/fuel ratio control and emissions monitoring.
The most common cause of P1184 (Linear 02 Sensor / Common Ground Wire Open Circuit) is: Broken or corroded common ground wire connection
Typical repair costs for P1184 range from $75 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may run poorly with reduced power and fuel economy. Safe to drive short distances but should be repaired promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1184 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System and Emissions Control
Difficulty
Type
Manufacturer
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