P105A Code - Reductant Pump Low Speed
Quick Answer
The P105A diagnostic trouble code (DTC) refers to a problem with the Reductant Pump Low Speed in the vehicle's exhaust system. Common causes include Faulty Reductant Pump, Wiring or connection issues, Low DEF fluid levels. 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, Wiring or connection issues, Low DEF fluid levels.
- 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.
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Code P105A Description
The P105A diagnostic trouble code (DTC) refers to a problem with the Reductant Pump Low Speed in the vehicle's exhaust system. The Reductant Pump is responsible for supplying the Diesel Exhaust Fluid (DEF) to the Selective Catalytic Reduction (SCR) system. The SCR system uses the DEF to reduce harmful emissions by converting nitrogen oxides (NOx) into nitrogen and water vapor. When the Reductant Pump is operating at a low speed or not functioning correctly, it can lead to inefficient emission reduction, poor fuel economy, and potential damage to the engine components.
Common Causes of P105A
- Faulty Reductant Pump
- Wiring or connection issues
- Low DEF fluid levels
- Clogged DEF filter
- Software or calibration errors
Symptoms of P105A
- Decreased fuel efficiency
- Engine misfires
- Reduced power and acceleration
- Check Engine Light illuminated
- Exhaust emitting excessive smoke
How to Fix P105A
- Diagnose the issue using a professional diagnostic tool to confirm the Reductant Pump Low Speed fault code.
- Inspect the Reductant Pump, wiring, and connections for any visible damage or corrosion.
- Check DEF fluid levels and the condition of the DEF filter.
- Clear the fault codes and reset the system to see if the issue reoccurs.
- Replace the Reductant Pump if it is determined to be faulty or repair any wiring/connection issues.
Cost to Fix P105A
The cost of repairing a Reductant Pump Low Speed issue can vary depending on the extent of the problem and the specific vehicle make and model. On average, the parts for a Reductant Pump replacement can range from $200 to $500, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may be between $300 and $800. It's recommended to consult with a qualified mechanic or dealership for an accurate estimate based on your vehicle's specific needs and location.
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Code P105A 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.
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