What Does P2052 Mean?
The ECM detects abnormally high voltage or resistance in the reductant injector circuit for Bank 2 Unit 1. This indicates an open circuit, short to voltage, or high resistance preventing proper injector control.
Common Causes
40%
Faulty reductant injector with open coil or high resistance
25%
Open circuit or broken wire in injector control circuit
20%
Poor connection at injector connector with high resistance
10%
Short to battery voltage in injector control wire
5%
ECM injector driver circuit failure
Diagnostic Steps
1
Step 1: Check injector connector for loose connections, pushed-out pins, or high resistance contacts
2
Step 2: Measure injector coil resistance with injector disconnected (should be within 3-8 ohms typically)
3
Step 3: Test for voltage at injector connector with key on - should not see battery voltage on control circuit
4
Step 4: Check continuity between ECM and injector connector on control circuit wiring
5
Step 5: Replace reductant injector if resistance is out of specification or infinite
Estimated Repair Cost
$300 - $1,300
Parts + labor, varies by vehicle and location
The ECM detects abnormally high voltage or resistance in the reductant injector circuit for Bank 2 Unit 1. This indicates an open circuit, short to voltage, or high resistance preventing proper injector control.
The most common cause of P2052 (Reductant Injection Valve Circuit High Bank 2 Unit 1) is: Faulty reductant injector with open coil or high resistance
Typical repair costs for P2052 range from $300 to $1,300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will display warning messages and may enter derate mode limiting speed and power. Extended operation may result in vehicle shutdown to comply with emissions regulations.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2052 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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