P0563 RAM Code - System Voltage High
Quick Answer
The Transmission Control Module (TCM) monitors the system voltage level at the TCM supply voltage terminal for the following failure conditions: - System Voltage Excessively Low - System Voltage Low - System Voltage High If the TCM supply voltage is below a threshold that is lower than the System Voltage Excessively Low threshold, the TCM will not supply power to the solenoid valves and pressure regulators. Common causes include Faulty alternator, Open or short system voltage circuit, Faulty Transmission Control Module (TCM). 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
- P0563 RAM indicates System Voltage High.
- Common causes
- Common causes include Faulty alternator, Open or short system voltage circuit, Faulty Transmission Control Module (TCM).
- 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 P0563 RAM Description
- System Voltage Excessively Low
- System Voltage Low
- System Voltage High
If the TCM supply voltage is below a threshold that is lower than the System Voltage Excessively Low threshold, the TCM will not supply power to the solenoid valves and pressure regulators. A Diagnostic Trouble Code (DTC) is set when one of the diagnostics is greater than a calibrated value for a calibrated amount of time.
What are the Possible Causes of the DTC P0563 RAM?
- Faulty alternator
- Open or short system voltage circuit
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0563 RAM?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0563 RAM 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 P0563 RAM Code
1. What does OBDII code P0563 mean?
P0563 indicates that the vehicle's powertrain control module (PCM) has detected a system voltage that is higher than the acceptable range, typically above 15.5 volts.
2. What are the common symptoms of code P0563?
Symptoms may include a check engine light, dimming or flickering lights, malfunctioning electronic components, or difficulty starting the vehicle.
3. What causes the P0563 code to appear?
Common causes include a faulty alternator, a defective voltage regulator, loose or corroded battery cables, or a failing battery.
4. Can a bad alternator cause the P0563 code?
Yes, a malfunctioning alternator that produces excessive voltage is a common cause of the P0563 code.
5. How is the P0563 code diagnosed?
A mechanic will use a multimeter to check the battery and alternator voltage, inspect the wiring and connections, and test the voltage regulator for proper function.
6. Is it safe to drive with a P0563 code?
Driving with this code can lead to further electrical damage or battery failure. It’s best to address it promptly to avoid additional issues.
7. How do you fix the P0563 code?
Repairs may include replacing a faulty alternator, repairing or replacing damaged wiring, cleaning or tightening battery connections, or replacing the voltage regulator.
8. Can a weak battery trigger the P0563 code?
While less common, a failing battery with inconsistent voltage output can contribute to this code.
9. Will clearing the P0563 code fix the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
10. How much does it cost to fix a P0563 code?
Repair costs vary depending on the cause, but replacing an alternator typically costs $300–$800, while smaller repairs like wiring fixes may cost less.
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