P105A Code - Reductant Pump Low Speed
Quick Answer
The reductant pump motor is controlled by the reductant control module. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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
- P105A indicates Reductant Pump Low Speed.
- Common causes
- Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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 P105A Description
What are the Possible Causes of the DTC P105A?
- Faulty Reductant Pump and Sensor Assembly
- Reductant Pump and Sensor Assembly harness is open or shorted
- Reductant Pump and Sensor Assembly circuit poor electrical connection
- Faulty Reductant Control Module
How to Fix the DTC P105A?
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 P105A 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.
Need more information about the P105A code?
Need more information on how to fix the P105A code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P105A code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P105A BMW — Internal Control Module VVT Error Voltage Too High
- P105A Buick — Reductant Pump Low Speed
- P105A Cadillac — Reductant Pump Low Speed
- P105A Chevrolet — Reductant Pump Low Speed
- P105A GMC — Reductant Pump Low Speed
- P105A MINI — Internal Control Module VVT Error Voltage Too High
Frequently Asked Questions about P105A Code
1. What are the common symptoms of OBDII code P105A (Reductant Pump Low Speed)?
The common symptoms include the check engine light coming on, reduced engine performance, and potential issues with the exhaust system.
2. What can cause OBDII code P105A (Reductant Pump Low Speed) to trigger?
The code may be triggered by a malfunctioning reductant pump, wiring issues, a faulty reductant pump control module, or low DEF fluid levels.
3. How can I diagnose the cause of OBDII code P105A (Reductant Pump Low Speed)?
Diagnosis typically involves checking the reductant pump and its wiring, inspecting the DEF fluid level, and using a scan tool to monitor system operation.
4. Can a DIYer repair OBDII code P105A (Reductant Pump Low Speed)?
While some DIYers may be able to replace the reductant pump or repair wiring issues, diagnosing and repairing the exact cause of the code may require professional help.
5. What are the consequences of ignoring OBDII code P105A (Reductant Pump Low Speed)?
Ignoring the code can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter or other emission control components.
6. Are there any tips for preventing OBDII code P105A (Reductant Pump Low Speed)?
Regularly checking and topping up DEF fluid levels, following recommended maintenance schedules, and addressing any related issues promptly can help prevent this code.
7. How much does it typically cost to repair OBDII code P105A (Reductant Pump Low Speed)?
The cost of repair can vary depending on the exact cause of the code, but it may range from $200 to $800 or more, including parts and labor.
8. Can OBDII code P105A (Reductant Pump Low Speed) be intermittent?
Yes, the code can be intermittent, especially if the issue is related to wiring or sensor connections that may temporarily lose contact.
9. Will OBDII code P105A (Reductant Pump Low Speed) cause the vehicle to fail an emissions test?
Yes, the code may cause the vehicle to fail an emissions test due to increased emissions output beyond acceptable limits.
10. How long can I drive with OBDII code P105A (Reductant Pump Low Speed) before getting it repaired?
It is recommended to address the issue as soon as possible to prevent further damage and ensure optimal engine performance and emissions control.
Discuss the causes and fixes for P105A OBDII Code
Code P105A comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
