P0708 – OBD-II DTC

OBD-II DTC P0708 – Transmission Range Sensor Circuit Low Input

DTC P0708 meaning

DTC P0708 refers to a problem with the Transmission Range Sensor Circuit, indicating a low input signal. The Transmission Range Sensor, also known as the Neutral Safety Switch, monitors the position of the transmission gear and sends this information to the Engine Control Module (ECM). A low input signal suggests that the ECM is not receiving the expected voltage or signal from the sensor, which can affect the vehicle’s ability to shift gears properly.

DTC P0708 symptoms

Common symptoms associated with DTC P0708 may include:

• Transmission not shifting properly
• Inability to start the engine in certain gear positions
• Check Engine Light illuminated
• Erratic or harsh shifting
• Vehicle may go into limp mode

DTC P0708 causes

Several factors can lead to the occurrence of DTC P0708, including:

• Faulty Transmission Range Sensor
• Wiring issues, such as shorts or open circuits
• Corroded or loose electrical connectors
• Faulty Engine Control Module (ECM)
• Mechanical issues within the transmission

DTC P0708 seriousness

DTC P0708 is considered a moderate to serious issue. While it may not cause immediate catastrophic failure, it can lead to significant drivability problems. If left unaddressed, it may result in further transmission damage or complete loss of transmission function, making it crucial to diagnose and repair the issue promptly.

How to diagnose DTC P0708

To diagnose DTC P0708, follow these steps:

1. Use an OBD-II scanner to confirm the DTC and check for any additional codes.
2. Inspect the Transmission Range Sensor and its wiring for visible damage or corrosion.
3. Test the voltage and ground at the sensor connector using a multimeter.
4. Check the continuity of the wiring between the sensor and the ECM.
5. Verify the operation of the Transmission Range Sensor by manually shifting through the gears and observing the signal changes.
6. If necessary, replace the Transmission Range Sensor and clear the DTC.

How to fix DTC P0708 step-by-step instructions

To fix DTC P0708, follow these step-by-step instructions:

1. Gather necessary tools: OBD-II scanner, multimeter, and basic hand tools.
2. Connect the OBD-II scanner to the vehicle and retrieve the DTC.
3. Inspect the Transmission Range Sensor and its wiring for any signs of damage.
4. Test the sensor’s voltage output using a multimeter compare it to manufacturer specifications.
5. If the sensor is faulty, disconnect the battery and replace the Transmission Range Sensor.
6. Reconnect all connectors and wiring, ensuring they are secure and free of corrosion.
7. Reconnect the battery and clear the DTC using the OBD-II scanner.
8. Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.