P1706 – OBD-II DTC

OBD-II DTC P1706 – Reverse Engagement Error

DTC P1706 meaning

DTC P1706 refers to a Reverse Engagement Error in the vehicle’s transmission system. This code indicates that the transmission control module (TCM) has detected an issue when attempting to engage the reverse gear. The TCM monitors various sensors and components to ensure proper operation, and when it identifies a discrepancy, it triggers this diagnostic trouble code.

DTC P1706 symptoms

Common symptoms associated with DTC P1706 may include:

• Inability to engage reverse gear
• Delayed or harsh shifting when attempting to reverse
• Transmission slipping or erratic behavior
• Check Engine Light illuminated
• Unusual noises when shifting into reverse

DTC P1706 causes

Several factors can lead to the activation of DTC P1706, including:

• Faulty transmission range sensor
• Wiring issues or poor connections in the transmission system
• Low transmission fluid levels or contamination
• Internal transmission problems, such as worn components
• Faulty TCM or software issues

DTC P1706 seriousness

DTC P1706 can be considered serious as it directly affects the vehicle’s ability to engage reverse gear. This can lead to safety concerns, especially in situations where reversing is necessary. Additionally, ignoring this code may result in further transmission damage or more extensive repairs down the line.

How to diagnose DTC P1706

To diagnose DTC P1706, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1706 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the transmission range sensor and its wiring for damage or disconnection.
4. Examine the transmission fluid level and condition.
5. Test the TCM for proper operation and software updates.
6. Perform a visual inspection of the transmission for any signs of wear or damage.

How to fix DTC P1706 step-by-step instructions

To fix DTC P1706, follow these steps:

1. Address any wiring issues by repairing or replacing damaged wires and connectors.
2. Replace the transmission range sensor if it is found to be faulty.
3. Ensure the transmission fluid is at the correct level and replace it if contaminated.
4. Inspect and repair any internal transmission components if necessary.
5. Reprogram or replace the TCM if it is determined to be faulty.
6. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC P1706

To erase DTC P1706, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the DTC.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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.