Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car's computer system that helps manage electricity. It's like when a light switch is stuck in the 'on' position and won't turn off.
The P101C code is triggered when the engine control module (ECM) detects a high voltage condition in the variable valve lift (VVL) load shedding relay control circuit.
The VVL load shedding relay is responsible for managing electrical loads in the vehicle, especially during engine start-up. A 'high' condition indicates that the relay control circuit is receiving too much voltage, which could be due to a short circuit, faulty relay, or wiring issues.
• Check Engine Light illuminated
• Electrical components not functioning properly
• Possible engine performance issues
• Faulty VVL load shedding relay
• Short circuit in the wiring
• Faulty ECM
VVL: Variable Valve Lift
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the VVL load shedding relay for proper operation.
• Replace the faulty VVL load shedding relay.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Relay tester
$100 - $300
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect electrical connections.
• Ensure relays are functioning properly.
• Avoid overloading the electrical system.
Electrical Circuit Issue
• Have a professional diagnose the issue to avoid further damage.
• Do not ignore the Check Engine Light as it can lead to more serious problems.
Check with your vehicle manufacturer for specific warranty coverage related to electrical components.
This code has been associated with vehicles that have complex electrical systems and is often seen in models with advanced engine management systems.
Moderate – It is advisable to address this issue soon to prevent potential electrical failures.
Driving with a malfunctioning electrical system can be dangerous. Ensure repairs are done promptly to maintain vehicle safety.
• Engine running
• Electrical loads active
The VVL load shedding relay is typically located in the vehicle's fuse box or relay panel.
Q: Can I drive my car with this code?
A: It's possible to drive short distances, but it's recommended to fix the issue soon to avoid electrical failures.
Q: Will this code affect my car's performance?
A: Yes, it can affect the performance of electrical components and potentially the engine.
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