P00C6 2014 Chevrolet Silverado Code - Fuel Rail Pressure Low During Engine Cranking
Quick Answer
The fuel rail pressure sensor detects fuel pressure within the fuel rail. Common causes include Faulty High Pressure Fuel Pump, Faulty Fuel Rail Pressure Sensor, High Pressure Fuel Pump harness is open or shorted. 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
- P00C6 2014 Chevrolet Silverado indicates Fuel Rail Pressure Low During Engine Cranking.
- Common causes
- Common causes include Faulty High Pressure Fuel Pump, Faulty Fuel Rail Pressure Sensor, High Pressure Fuel Pump harness is open or shorted.
- 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 P00C6 2014 Chevrolet Silverado Description
High pressure fuel is regulated by the high-pressure fuel pump actuator, which is a part of the high-pressure fuel pump. The high-pressure fuel pump actuator is a solenoid valve. The ECM provides a voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high-pressure fuel pump actuator, and the low control circuit driver Pulse-Width Modulates (PWM) the low control circuit to ground.
The high-pressure mechanical fuel pump is driven by three lobes on the camshaft. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the high-pressure fuel pump actuator with the position of each of the camshaft lobes. The ECM regulates fuel pressure by adjusting the portion of each pump stroke that provides fuel to the rail.
The ECM monitors the fuel rail fuel pressure sensor and the high-pressure fuel pump actuator to determine if the commanded and actual pressure are within a predetermined range, or if the amount of fuel pressure correction exceeds a calibrated pressure.
The Diagnostic Trouble Code (DTC) will set if the ECM detects that the fuel pressure is not rising or has fallen beyond acceptable limits during engine cranking.
What are the Possible Causes of the DTC P00C6 2014 Chevrolet Silverado?
- Faulty High Pressure Fuel Pump
- Faulty Fuel Rail Pressure Sensor
- High Pressure Fuel Pump harness is open or shorted
- High Pressure Fuel Pump electrical circuit poor connection
How to Fix the DTC P00C6 2014 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 P00C6 2014 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.
Need more information about the P00C6 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P00C6 2014 Chevrolet Silverado Code
1. What does the OBDII code P00C6 mean on a 2014 Chevrolet Silverado?
P00C6 indicates that the fuel rail pressure is lower than expected during engine cranking, which can affect engine start-up.
2. What are the common symptoms of the P00C6 code?
Symptoms include difficulty starting the engine, extended cranking time, reduced engine performance, and the Check Engine Light being illuminated.
3. What causes the P00C6 code to appear in a 2014 Chevrolet Silverado?
Possible causes include a faulty high-pressure fuel pump, fuel rail pressure sensor issues, clogged fuel injectors, low fuel pressure from the fuel tank, or fuel line leaks.
4. Can a dirty fuel filter trigger the P00C6 code?
Yes, a clogged or dirty fuel filter can restrict fuel flow, leading to low fuel pressure and triggering the code.
5. How is the P00C6 code diagnosed?
A mechanic will use a scan tool to read fuel pressure data, inspect the fuel pump and pressure sensor, check for fuel leaks, and test the fuel system for proper operation.
6. Can I drive my Silverado with the P00C6 code?
Driving with this code is not recommended, as it can lead to poor engine performance and potential damage to the fuel system.
7. How do you fix the P00C6 code on a 2014 Chevrolet Silverado?
Repairs may include replacing the high-pressure fuel pump, cleaning or replacing fuel injectors, fixing fuel line leaks, or replacing the fuel rail pressure sensor.
8. Could a weak battery cause the P00C6 code?
Yes, a weak battery can result in insufficient power to the fuel pump, which may cause low fuel rail pressure during cranking.
9. How much does it cost to repair the P00C6 code?
Repair costs vary depending on the issue but can range from $200 to over $1,000, depending on whether the fuel pump, sensor, or other components need to be replaced.
10. Can a software update fix the P00C6 code?
In some cases, a software update to the engine control module (ECM) may resolve the issue if it’s related to incorrect fuel pressure calibration. Always check with a dealership or qualified mechanic.
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