What Does P2205 Mean?
The PCM has detected an open circuit in the NOx sensor heater control circuit on Bank 1. The heater element is necessary to bring the sensor to optimal operating temperature for accurate readings.
Common Causes
25%
Blown fuse or fusible link in NOx sensor heater circuit
30%
Failed NOx sensor heater element (open circuit)
25%
Broken or disconnected wiring in heater circuit
15%
Corroded or damaged connector terminals
5%
Failed PCM heater driver circuit
Diagnostic Steps
1
Step 1: Check all related fuses and fusible links in the NOx sensor heater circuit
2
Step 2: Disconnect NOx sensor and measure heater element resistance (typically 2-6 ohms when cold)
3
Step 3: Check for battery voltage at heater power supply wire with key on
4
Step 4: Verify continuity in all heater circuit wiring from sensor to PCM
5
Step 5: If wiring and fuses are good but resistance is infinite, replace NOx sensor
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit in the NOx sensor heater control circuit on Bank 1. The heater element is necessary to bring the sensor to optimal operating temperature for accurate readings.
The most common cause of P2205 (NOx Sensor Heater Control Circuit/Open Bank 1) is: Blown fuse or fusible link in NOx sensor heater circuit
Typical repair costs for P2205 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short distances, but sensor cannot function properly until warmed by exhaust heat alone. May trigger limp mode on some vehicles.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2205 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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