P0708 2015 Chevrolet Silverado Code - Transmission Range Switch Circuit High Voltage
Quick Answer
The Transmission Internal Mode Switch (IMS) consists of 5 internal switches, A, B, C, P, and Neutral Start. Common causes include Faulty Transmission Internal Mode Switch (IMS), 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
- P0708 2015 Chevrolet Silverado indicates Transmission Range Switch Circuit High Voltage.
- Common causes
- Common causes include Faulty Transmission Internal Mode Switch (IMS), 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 P0708 2015 Chevrolet Silverado Description
The Engine Control Module (ECM) supplies a signal circuit to the neutral start switch. The ECM uses the state of the neutral start switch state as confirmation that the transmission is in neutral or park before the engine starter is engaged.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the internal mode switch is reporting an illegal range for greater than 1 s.
What are the Possible Causes of the DTC P0708 2015 Chevrolet Silverado?
- Faulty Transmission Internal Mode Switch (IMS)
- 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 P0708 2015 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0708 2015 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.
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Frequently Asked Questions about P0708 2015 Chevrolet Silverado Code
1. What does the OBDII code P0708 mean on a 2015 Chevrolet Silverado?
Code P0708 indicates a high voltage issue in the transmission range switch circuit, which monitors the gear selector position.
2. What are the common symptoms of code P0708 on a 2015 Chevrolet Silverado?
Symptoms may include difficulty shifting gears, the transmission staying in limp mode, the check engine light illuminating, or incorrect gear position display.
3. What causes the P0708 code on a 2015 Chevrolet Silverado?
Common causes include a faulty transmission range sensor, damaged wiring or connectors in the circuit, or issues with the powertrain control module (PCM).
4. Can I still drive my 2015 Chevrolet Silverado with code P0708?
Driving is possible but not recommended, as the transmission may not shift properly, leading to reduced performance and potential safety risks.
5. How do I diagnose the P0708 code on my 2015 Chevrolet Silverado?
Start by inspecting the transmission range sensor, checking for damaged wiring or connectors, and testing the circuit with a multimeter for high voltage readings.
6. How do I fix code P0708 on a 2015 Chevrolet Silverado?
Repairs may involve replacing the transmission range sensor, repairing or replacing damaged wiring, cleaning connectors, or reprogramming the PCM if necessary.
7. Is the transmission range sensor expensive to replace on a 2015 Chevrolet Silverado?
The cost varies but typically ranges from $150 to $300 for parts and labor, depending on your location and the repair shop.
8. Can a dead battery cause code P0708 on a 2015 Chevrolet Silverado?
A dead or weak battery is unlikely to cause this code directly but could lead to electrical issues that affect the transmission range sensor circuit.
9. Will clearing the code fix P0708 on a 2015 Chevrolet Silverado?
Clearing the code without addressing the underlying issue will only temporarily remove the warning; the code will likely return.
10. Does code P0708 affect fuel efficiency on a 2015 Chevrolet Silverado?
Yes, if the transmission is stuck in limp mode or not shifting properly, it can negatively impact fuel efficiency.
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