What Does P2054 Mean?
The PCM detects abnormally low voltage or resistance in the reductant injection valve circuit for Bank 1, Unit 2. This suggests a short to ground or internal injector coil short circuit.
Common Causes
35%
Short to ground in wiring harness to reductant injection valve
30%
Failed reductant injection valve with internal short circuit
20%
Water intrusion or corrosion causing short in connector
10%
Damaged wiring from road debris or improper installation
5%
Failed DEF control module with internal short
Diagnostic Steps
1
Step 1: Disconnect reductant injection valve connector and measure resistance of valve coil
2
Step 2: Check for short to ground on both control and power wires from valve back to module
3
Step 3: Inspect wiring harness along frame rails and near exhaust for chafing or damage
4
Step 4: Use insulation resistance tester (megohmmeter) to detect high-resistance shorts if needed
5
Step 5: Replace injection valve if coil resistance is below specification or wiring if short is found
Estimated Repair Cost
$250 - $1,200
Parts + labor, varies by vehicle and location
The PCM detects abnormally low voltage or resistance in the reductant injection valve circuit for Bank 1, Unit 2. This suggests a short to ground or internal injector coil short circuit.
The most common cause of P2054 (Reductant Injection Valve Circuit Low Bank 1 Unit 2) is: Short to ground in wiring harness to reductant injection valve
Typical repair costs for P2054 range from $250 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable but emissions compliance is compromised. May trigger engine derate or reduced power mode after certain mileage or time period.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2054 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System (SCR/DEF)
Difficulty
Type
Generic (SAE)
Recommended Tools
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