Reductant Injection Valve Circuit Open Bank 1 Unit 2
The P2053 code indicates an open circuit in the reductant injection valve for Bank 1 Unit 2, which is part of the Selective Catalytic Reduction (SCR) system. This valve injects diesel exhaust fluid (DEF) into the exhaust stream to reduce NOx emissions. An open circuit means there is a break in the electrical path, preventing the valve from operating. This can lead to increased emissions and potential derate of engine power.
01. Most Common Causes
- Open or shorted wiring in the reductant injection valve circuit
- Faulty reductant injection valve
- Corroded or loose electrical connector
- Failed SCR control module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or derate
- Increased NOx emissions
- Possible DEF warning light
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the wiring and connector for damage, corrosion, or loose connections.
Step 3: Measure resistance across the injection valve solenoid; compare to specifications (typically 2-10 ohms).
Step 4: Check for voltage and ground at the valve connector with the ignition on.
Step 5: If wiring and valve are okay, test the SCR control module output.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the vehicle may enter a derate mode, reducing power and potentially causing further issues. Additionally, emissions will be higher.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the issue is a simple wiring fix or requires valve replacement.