P2051 Chevrolet Code - Reductant Injection Valve Circuit Low Bank 2 Unit 1
Quick Answer
The Reductant Dosing Valve (Reductant Injection Valve) is used to meter and atomize the reductant liquid before it is mixed with the exhaust gas. Common causes include Faulty Reductant Injection Valve, Reductant Injection Valve harness is open or shorted, Reductant Injection Valve circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2051 Chevrolet indicates Reductant Injection Valve Circuit Low Bank 2 Unit 1.
- Common causes
- Common causes include Faulty Reductant Injection Valve, Reductant Injection Valve harness is open or shorted, Reductant Injection Valve circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2051 Chevrolet Description
What are the Possible Causes of the DTC P2051 Chevrolet?
- Faulty Reductant Injection Valve
- Reductant Injection Valve harness is open or shorted
- Reductant Injection Valve circuit poor electrical connection
How to Fix the DTC P2051 Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2051 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P2051 Chevrolet Code
1. What does the OBDII code P2051 mean on a Chevrolet?
P2051 indicates a fault in the reductant injection valve circuit for Bank 2, Unit 1, where the circuit voltage is lower than expected.
2. What are the common symptoms of code P2051 in a Chevrolet?
Symptoms may include the check engine light turning on, reduced fuel efficiency, possible diesel exhaust fluid (DEF) system issues, and increased emissions.
3. What causes the P2051 code to appear in a Chevrolet?
Common causes include a damaged reductant injection valve, faulty wiring or connectors, a malfunctioning reductant control module, or a blown fuse in the circuit.
4. How do I diagnose the P2051 code in my Chevrolet?
Start by inspecting the wiring and connectors for damage or corrosion, test the reductant injection valve for proper function, and use a multimeter to check circuit voltage levels.
5. Can I drive my Chevrolet with the P2051 code active?
Driving with this code is not recommended, as it may lead to increased emissions or damage to the selective catalytic reduction (SCR) system.
6. How do I fix the P2051 code on my Chevrolet?
Repairs may involve replacing the reductant injection valve, repairing damaged wires or connectors, replacing a blown fuse, or reprogramming the reductant control module.
7. How much does it cost to repair the P2051 code on a Chevrolet?
Repair costs vary but typically range from $150 to $600, depending on whether you need to replace the valve or repair wiring.
8. Can a bad reductant injection valve cause the P2051 code?
Yes, a faulty reductant injection valve is one of the most common causes of the P2051 code.
9. What tools are needed to troubleshoot the P2051 code in a Chevrolet?
You’ll need an OBDII scanner, a multimeter, and possibly wiring diagrams specific to your Chevrolet model.
10. Does the P2051 code always require parts replacement?
Not always. Sometimes cleaning corroded connectors, repairing damaged wires, or resetting the control module can resolve the issue.
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