P0656 Chevrolet Code - Fuel Level Output Circuit Malfunction
Quick Answer
The Powertrain Control Module (PCM) controls the fuel gauge through the fuel gauge control circuit. Common causes include Faulty Fuel Level Gauge, Fuel Level Gauge harness is open or shorted, Fuel Level Gauge 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
- P0656 Chevrolet indicates Fuel Level Output Circuit Malfunction.
- Common causes
- Common causes include Faulty Fuel Level Gauge, Fuel Level Gauge harness is open or shorted, Fuel Level Gauge 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 P0656 Chevrolet Description
The PCM controls the gauge by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. Each driver has a fault line which the PCM monitors.
What are the Possible Causes of the DTC P0656 Chevrolet?
- Faulty Fuel Level Gauge
- Fuel Level Gauge harness is open or shorted
- Fuel Level Gauge circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P0656 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 P0656 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 P0656 Chevrolet Code
1. What are common symptoms of OBDII code P0656 in a Chevrolet related to the fuel level output circuit malfunction?
- Common symptoms include inaccurate fuel gauge readings, fluctuating fuel level readings, and illumination of the check engine light.
2. What are possible causes of the OBDII code P0656 in a Chevrolet indicating a fuel level output circuit malfunction?
- Potential causes include a faulty fuel level sensor, damaged wiring or connectors in the fuel level circuit, or a defective instrument cluster.
3. How can I diagnose the OBDII code P0656 in my Chevrolet that points to a fuel level output circuit malfunction?
- Diagnosis involves using a scan tool to retrieve the trouble codes, checking the fuel level sensor for proper operation, inspecting wiring for damage, and testing the instrument cluster.
4. Can a malfunctioning fuel level output circuit impact the vehicle's performance in a Chevrolet with OBDII code P0656?
- While the primary impact is on the accuracy of the fuel level readings, an improperly functioning fuel level output circuit may affect fuel consumption calculations and lead to unexpected fuel shortages.
5. Is it safe to continue driving my Chevrolet with the OBDII code P0656 related to a fuel level output circuit malfunction?
- It is generally safe to drive the vehicle, but it is recommended to address the issue promptly to avoid running out of fuel unexpectedly due to inaccurate readings.
6. What are some repair tips for fixing the OBDII code P0656 in a Chevrolet caused by a fuel level output circuit malfunction?
- Repair tips include checking and replacing the fuel level sensor if necessary, repairing any damaged wiring or connectors, and resetting the trouble code after completing the repairs.
7. How much can I expect to pay to repair the OBDII code P0656 in my Chevrolet related to the fuel level output circuit malfunction?
- Repair costs can vary depending on the exact cause of the issue, but they typically range from $150 to $400 for parts and labor.
8. Can a DIY enthusiast without extensive automotive experience fix the OBDII code P0656 in a Chevrolet caused by a fuel level output circuit malfunction?
- While some basic troubleshooting steps can be performed by DIY enthusiasts, it is recommended to consult a professional mechanic for a proper diagnosis and repair of the fuel level output circuit issue.
9. Are there any recalls or service bulletins related to the OBDII code P0656 in Chevrolet vehicles with a fuel level output circuit malfunction?
- It is advisable to check with Chevrolet or the National Highway Traffic Safety Administration (NHTSA) for any relevant recalls or service bulletins related to this specific OBDII code.
10. How can I prevent the OBDII code P0656 from reoccurring in my Chevrolet due to a fuel level output circuit malfunction?
- Regularly inspecting and maintaining the fuel level sensor, wiring, and connectors, as well as ensuring proper fuel system operation, can help prevent the recurrence of the OBDII code P0656 related to the fuel level output circuit malfunction.
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