Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble talking to a switch that helps control the car's power to the wheels. It's like when a light switch in your house isn't working right.
The P0818 code is triggered when the vehicle's powertrain control module (PCM) detects an issue with the input circuit of the driveline disconnect switch.
The driveline disconnect switch is part of the vehicle's transmission system, which allows the vehicle to disengage the driveline for purposes such as improving fuel efficiency or enabling different driving modes. When the PCM detects an abnormal signal or no signal from this switch, it triggers the P0818 code.
• Check Engine Light is on
• Vehicle may not switch driving modes properly
• Possible decrease in fuel efficiency
• Faulty driveline disconnect switch
• Damaged or corroded wiring or connectors
• Faulty PCM
PCM: Powertrain Control Module, the computer that controls the engine and transmission.
Driveline: The components that transfer power from the engine to the wheels.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the driveline disconnect switch for proper operation.
• Replace the faulty driveline disconnect switch.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, wrenches)
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Jeep Wrangler
• Regular maintenance checks of the transmission system.
• Ensure all wiring and connectors are clean and secure.
• Use the vehicle's driveline modes as recommended by the manufacturer.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light comes on.
• Avoid using driveline modes if the system is malfunctioning until repaired.
Check with the vehicle manufacturer for specific warranty coverage on the transmission system.
This code has been more common in vehicles with advanced transmission systems that offer multiple driving modes.
Moderate – It is advisable to address this issue soon to prevent potential drivability problems.
Driving with a malfunctioning driveline system can affect vehicle performance and safety. It is important to address this issue promptly.
• Vehicle in park or neutral.
• Engine running at normal operating temperature.
The driveline disconnect switch is typically located near the transmission or transfer case, often accessible from underneath the vehicle.
Q: Can I drive with a P0818 code?
A: It is possible to drive with this code, but it is not recommended as it may affect vehicle performance.
Q: Will a P0818 code cause the Check Engine Light to come on?
A: Yes, a P0818 code will typically trigger the Check Engine Light.
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