What Does P2050 Mean?
The ECM has detected an open circuit or electrical fault in the reductant injector valve circuit for Bank 2 Unit 1. This prevents proper DEF injection and NOx reduction in the exhaust aftertreatment system.
Common Causes
40%
Faulty reductant injector with open coil winding or internal failure
25%
Broken or disconnected wiring to reductant injector
20%
Corroded or damaged injector connector preventing electrical contact
10%
ECM driver circuit failure for injector control
5%
Blown fuse or open relay in reductant injector power supply
Diagnostic Steps
1
Step 1: Inspect reductant injector connector for damage, corrosion, or loose connections
2
Step 2: Measure injector coil resistance with multimeter (typical range 3-8 ohms, verify with service data)
3
Step 3: Check continuity of wiring between ECM and injector connector on both power and ground circuits
4
Step 4: Verify power supply to injector using test light or multimeter during commanded injection
5
Step 5: If wiring and power are good, replace reductant injector and retest system
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The ECM has detected an open circuit or electrical fault in the reductant injector valve circuit for Bank 2 Unit 1. This prevents proper DEF injection and NOx reduction in the exhaust aftertreatment system.
The most common cause of P2050 (Reductant Injection Valve Circuit/Open Bank 2 Unit 1) is: Faulty reductant injector with open coil winding or internal failure
Typical repair costs for P2050 range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter power derate mode and display emissions system warnings. May result in vehicle no-start or shutdown after grace period expires.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2050 to identify the root cause.
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Quick Info
Category
Powertrain
System
Selective Catalytic Reduction (SCR) Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
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