P18B7 2016 Chevrolet Silverado Code - Internal Mode Switch 'C' Circuit Shorted
Quick Answer
The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch 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
- P18B7 2016 Chevrolet Silverado indicates Internal Mode Switch 'C' Circuit Shorted.
- Common causes
- Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch 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 P18B7 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P18B7 2016 Chevrolet Silverado?
- Faulty Transmission Internal Mode Switch
- Transmission Internal Mode Switch harness is open or shorted
- Transmission Internal Mode Switch circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P18B7 2016 Chevrolet Silverado?
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 P18B7 2016 Chevrolet Silverado 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.
Need more information about the P18B7 2016 Chevrolet Silverado code?
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Frequently Asked Questions about P18B7 2016 Chevrolet Silverado Code
What does the OBDII code P18B7 mean for a 2016 Chevrolet Silverado?
P18B7 refers to an issue with the internal mode switch 'C' circuit, indicating a short in the wiring or component related to transmission control.
What are common symptoms of the P18B7 code?
Symptoms may include erratic shifting, the transmission stuck in one gear, or the check engine light illuminating.
What causes the P18B7 code in a Chevrolet Silverado?
Common causes include damaged wiring, a short circuit in the internal mode switch, or a malfunctioning transmission control module.
How can I fix the P18B7 code?
Repairs may involve inspecting and repairing damaged wiring, replacing the internal mode switch, or reprogramming or replacing the transmission control module.
Can I drive my Silverado with the P18B7 code?
Driving with this code may lead to transmission issues or further damage, so it’s best to address it promptly.
How is the P18B7 code diagnosed?
Technicians diagnose this code by checking wiring, testing the internal mode switch, and using a scan tool to monitor transmission control module signals.
Does the P18B7 code require part replacement?
Not always. It may only require repairing wiring or connections, but a faulty internal mode switch or control module might need replacement.
How much does it cost to fix the P18B7 code?
Costs vary depending on the issue but can range from $100 for wiring repairs to $500 or more for part replacement.
Does the P18B7 code affect fuel efficiency?
Indirectly, yes. Transmission issues caused by this code can lead to reduced fuel efficiency due to improper gear shifting.
Is the P18B7 code common in 2016 Chevrolet Silverado trucks?
While not widespread, it can occur in vehicles with worn wiring or transmission components, especially with higher mileage.
Discuss the causes and fixes for P18B7 2016 Chevrolet Silverado OBDII Code
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