P129B 2016 Chevrolet Silverado Code - Fuel Pump Driver Control Module System Voltage Low
Quick Answer
The Fuel Pump Power Control Module monitors the battery positive voltage circuit to verify the voltage is within the normal operating range. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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
- P129B 2016 Chevrolet Silverado indicates Fuel Pump Driver Control Module System Voltage Low.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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 P129B 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P129B 2016 Chevrolet Silverado?
- Faulty Fuel Pump Driver Control Module
- Fuel Pump Driver Control Module harness is open or shorted
- Fuel Pump Driver Control Module circuit poor electrical connection
How to Fix the DTC P129B 2016 Chevrolet Silverado?
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 P129B 2016 Chevrolet Silverado 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 P129B 2016 Chevrolet Silverado Code
What does the OBDII code P129B mean on a 2016 Chevrolet Silverado?
P129B indicates that the Fuel Pump Driver Control Module (FPCM) is detecting a system voltage that is lower than the expected range, which can affect fuel delivery.
What are the common symptoms of a P129B code in a 2016 Chevrolet Silverado?
Common symptoms include difficulty starting the engine, poor fuel efficiency, reduced engine performance, and in some cases, stalling.
What causes the P129B code to appear?
The code can be caused by a failing Fuel Pump Driver Control Module, a weak battery, corroded or damaged wiring, poor ground connections, or a failing alternator.
Can a bad battery trigger the P129B code?
Yes, a weak or failing battery can cause the Fuel Pump Driver Control Module to receive low voltage, triggering the P129B code.
How do you diagnose a P129B code on a 2016 Chevrolet Silverado?
Start by checking the battery voltage and charging system, inspect the wiring and connectors for damage or corrosion, and test the Fuel Pump Driver Control Module for proper operation.
Can I drive my Silverado with a P129B code?
It’s not recommended to drive with this code for an extended period as it could lead to engine performance issues, stalling, or further damage to the fuel system.
How do you fix the P129B code?
Repairs may include replacing the Fuel Pump Driver Control Module, repairing or replacing damaged wiring, cleaning corroded connectors, or addressing charging system issues like a weak battery or faulty alternator.
Does the Fuel Pump Driver Control Module need to be reprogrammed after replacement?
Yes, in many cases, the Fuel Pump Driver Control Module will need to be reprogrammed or calibrated to work correctly with the vehicle's ECU.
Can a failing alternator cause the P129B code?
Yes, a failing alternator can result in low system voltage, which may trigger the P129B code.
How much does it cost to fix a P129B code on a 2016 Chevrolet Silverado?
The cost can vary, but replacing the Fuel Pump Driver Control Module typically ranges from $300 to $700, depending on labor rates and parts pricing. Additional costs may apply if wiring or charging system repairs are needed.
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