P18AD Buick Code - Transmission Range Control Valve 2 Position Switch Circuit Stuck Off
Quick Answer
As the vehicle speed increases, the transmission control module (TCM) receives input signals from the automatic transmission input and output speed sensors, throttle position sensor and other vehicle sensors to determine the precise moment to de-energize or “turn off” 1-2-3-4-5-6 solenoid and the solenoid. Common causes include Low transmission fluid, Faulty Transmission Range Control Valve 2 Position Switch, Transmission Range Control Valve 2 Position Switch 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
- P18AD Buick indicates Transmission Range Control Valve 2 Position Switch Circuit Stuck Off.
- Common causes
- Common causes include Low transmission fluid, Faulty Transmission Range Control Valve 2 Position Switch, Transmission Range Control Valve 2 Position Switch 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 P18AD Buick Description
What are the Possible Causes of the DTC P18AD Buick?
- Low transmission fluid
- Faulty Transmission Range Control Valve 2 Position Switch
- Transmission Range Control Valve 2 Position Switch harness is open or shorted
- Transmission Range Control Valve 2 Position Switch circuit poor electrical connection
- Faulty Control Valve Solenoid Body
How to Fix the DTC P18AD Buick?
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 P18AD Buick 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 P18AD Buick Code
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