What Does P2207 Mean?
The PCM detects abnormally high voltage or current in the NOx sensor heater control circuit on Bank 1. This typically indicates a short to voltage or low resistance in the heater circuit.
Common Causes
35%
Short to voltage in heater circuit wiring
30%
Partially shorted NOx sensor heater element
15%
Water intrusion in sensor connector causing cross-circuit short
12%
Damaged wiring insulation causing intermittent short
8%
PCM heater driver circuit failure
Diagnostic Steps
1
Step 1: Disconnect NOx sensor and measure heater element resistance (should be 2-6 ohms, lower indicates short)
2
Step 2: With sensor disconnected, check for voltage on heater ground circuit (should be none)
3
Step 3: Inspect wiring harness for damage, especially near heat sources or moving components
4
Step 4: Check for water or contamination inside sensor connector
5
Step 5: Monitor heater current draw during operation to confirm excessive amperage
Estimated Repair Cost
$180 - $900
Parts + labor, varies by vehicle and location
The PCM detects abnormally high voltage or current in the NOx sensor heater control circuit on Bank 1. This typically indicates a short to voltage or low resistance in the heater circuit.
The most common cause of P2207 (NOx Sensor Heater Control Circuit High Bank 1) is: Short to voltage in heater circuit wiring
Typical repair costs for P2207 range from $180 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but excessive current may blow fuses or damage PCM heater driver. Address promptly to prevent further electrical damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2207 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
A quality scan tool helps you read codes, view live data, and clear faults.
