What Does P1182 Mean?
During deceleration fuel cut-off (when the ECM stops fuel delivery), the downstream oxygen sensor on Bank 1 shows an open circuit condition. This indicates a wiring issue, poor connection, or internal sensor failure that becomes apparent during specific operating conditions.
Common Causes
40%
Intermittent open circuit in O2 sensor wiring or connector
35%
Failed oxygen sensor with internal open circuit
15%
Corroded or damaged connector terminals
10%
Broken wire due to heat or vibration stress
Diagnostic Steps
1
Step 1: Perform wiggle test on O2 sensor connector and wiring while monitoring sensor signal on scan tool
2
Step 2: Inspect connector for corrosion, bent pins, or moisture intrusion
3
Step 3: Test continuity and resistance of O2 sensor wiring from ECM to sensor during coast-down conditions
4
Step 4: Check sensor ground circuit integrity and proper connection to chassis/engine ground
5
Step 5: Replace sensor if internal open circuit is confirmed, or repair wiring as needed
Estimated Repair Cost
$100 - $400
Parts + labor, varies by vehicle and location
During deceleration fuel cut-off (when the ECM stops fuel delivery), the downstream oxygen sensor on Bank 1 shows an open circuit condition. This indicates a wiring issue, poor connection, or internal sensor failure that becomes apparent during specific operating conditions.
The most common cause of P1182 (O2 Sensor (Bank 1 Sensor 2) Open Circuit During Coast Down Fuel Cut-off) is: Intermittent open circuit in O2 sensor wiring or connector
Typical repair costs for P1182 range from $100 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but emissions monitoring will be incomplete. Fuel economy may be slightly affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1182 to identify the root cause.
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Quick Info
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Powertrain
System
Emissions Control System
Difficulty
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