P1717 Honda Odyssey

If you’re looking for a family vehicle that blends space, comfort, and reliability, the P1717 Honda Odyssey is a model you’ll likely encounter. This specific code, however, points not to a trim level but to a diagnostic trouble code that can affect this popular minivan.

Understanding what the P1717 code means is crucial for any Odyssey owner. It can save you time, money, and prevent further damage to your vehicle. This guide will explain everything you need to know in simple, clear terms.

The P1717 code is an OBD-II diagnostic trouble code that stands for “Secondary Shaft Speed Sensor Circuit Malfunction.” In plain English, it means your Honda Odyssey’s transmission computer is detecting an irregular or missing signal from one of its internal speed sensors.

This sensor monitors the rotation speed of the transmission’s secondary shaft. Your van’s computer uses this data, along with input from other sensors, to control shift timing and pressure. When the signal is wrong, it triggers the check engine light.

What Causes the P1717 Code in a Honda Odyssey?

Several issues can lead to the P1717 code appearing. It’s rarely just one thing, so its helpful to check these common culprits in order.

Faulty Secondary Shaft Speed Sensor: The sensor itself can fail due to age, heat, or internal electrical problems. This is often the primary cause.
Damaged Wiring or Connectors: The wires leading to the sensor can get frayed, corroded, or chewed by rodents. A loose connector can also interrupt the signal.
Problems with the Sensor Ring: The sensor reads speed from a toothed ring on the shaft. If this ring is damaged or has debris stuck to it, the signal will be incorrect.
Low or Degraded Transmission Fluid: Dirty or low fluid can affect hydraulic pressure and sensor operation, leading to erratic signals.
Failing Transmission Control Module (TCM): While less common, the computer that processes the sensor signal could have an internal fault.

Symptoms You Might Notice

You’ll likely experience more than just a check engine light. The P1717 code often comes with noticeable driving issues that affect performance.

Illuminated Check Engine Light and possibly the “D” indicator flashing.
Harsh or erratic shifting, especially between 2nd and 3rd gears.
Transmission slipping or feeling like it’s in the wrong gear.
Poor fuel economy due to inefficient shifting.
In some cases, the transmission may default to a “limp mode,” locking into a single gear to prevent damage.

How to Diagnose the P1717 Code

While fixing this issue often requires mechanical skill, you can start with some basic diagnostics. Always prioritize safety and consult a professional if you’re unsure.

Step 1: Scan and Record

Use an OBD-II scanner to confirm the code is P1717. Clear the code and take the vehicle for a short test drive. If it returns immediately, the problem is active and current.

Step 2: Check the Transmission Fluid

This is a simple but critical step. With the engine warm and running, check the transmission fluid level and condition using the dipstick.

Is the fluid at the correct level?
Does it smell burnt or look dark and dirty?
Low or bad fluid is a common aggravating factor.

Step 3: Visual Inspection

Locate the secondary shaft speed sensor. It’s typically on the side of the transmission. Carefully inspect the wiring harness and connector for any obvious damage, corrosion, or loose pins.

Step 4: Sensor Testing

Testing the sensor’s resistance (ohms) with a multimeter requires a repair manual for specific values. You can also check for reference voltage and ground at the connector with the key on.

Repair Procedures and Costs

The repair path depends entirely on the root cause you find during diagnosis. Here’s a breakdown of common fixes.

Replacing the Secondary Shaft Speed Sensor

This is the most frequent fix. The sensor is usually held in by one bolt and is a plug-and-play component.

Disconnect the negative battery terminal for safety.
Locate and unplug the electrical connector from the sensor.
Remove the mounting bolt and carefully pull the sensor out.
Install the new sensor with a new O-ring (if provided), reconnect the wiring, and clear the codes.

Estimated Cost: The part costs between $50 and $150. A mechanic might charge 1-2 hours of labor, bringing the total to $200-$400.

Repairing Wiring Harness

If the wiring is damaged, you may be able to splice in a new section. Use proper solder and heat shrink tubing, not just electrical tape, for a durable repair.

Transmission Fluid Service

If the fluid is low or degraded, a drain and refill or a full flush can sometimes resolve the issue, especially if caught early. This is good maintenance regardless.

Estimated Cost: A fluid service typically ranges from $100 to $250.

Major Transmission Work

If the sensor ring is damaged internally or there are other mechanical failures, the transmission may need to be opened. This is the most expensive scenario.

Estimated Cost: This can range from $1,500 to over $3,500 for a rebuild or replacement.

Is It Safe to Drive With a P1717 Code?

Driving with the P1717 code is not recommended for an extended period. The erratic shifting can be a safety hazard in traffic, and continuing to drive could lead to more severe internal transmission damage.

If the vehicle goes into limp mode, your speed will be severely limited. You should drive it only as far as necessary to get it to a repair shop.

Preventative Maintenance Tips

To avoid issues like the P1717 code, regular maintenance is your best defense. Following Honda’s recommended service schedule makes a big difference.

Change your transmission fluid at the intervals specified in your owner’s manual (often around 30,000-60,000 miles).
Address any other transmission symptoms immediately, like slight hesitation or rough shifts.
Keep the engine bay clean and protect it from rodents that might chew wires.
During other services, ask the technician to check for any visible damage to transmission sensors and wiring.

FAQs About the P1717 Code

Can I fix a P1717 code myself?

If you’re comfortable with basic tools and diagnostics, replacing the sensor itself is often straightforward. However, if the problem is internal or involves complex wiring, a professional mechanic is the better choice.

Will the P1717 code clear itself?

If the intermittent problem that caused it goes away, the code may clear after several drive cycles. However, the underlying issue usually persists and will likely trigger the light again. It’s best to diagnose it properly.

What’s the difference between P1717 and P0720?

Both are speed sensor codes, but they monitor different parts. P0720 relates to the output shaft speed sensor, while P1717 is specific to the secondary shaft speed sensor inside the transmission.

Does this code mean my transmission is failing?

Not necessarily. While it can lead to failure if ignored, it often points to a single faulty sensor or wiring issue, which is a repairable component. Prompt diagnosis is key to avoiding major damage.

Are there common model years for this problem?

The P1717 code has been reported across multiple generations of the Honda Odyssey, particularly in models from the early 2000s to the 2010s. It’s not limited to one specific year.

Conclusion

The P1717 Honda Odyssey code is a clear call to action from your vehicle’s computer. While it signals a transmission-related sensor problem, it doesn’t automatically mean a catastrophic repair bill. By understanding the causes—from a simple faulty sensor to wiring or fluid issues—you can approach the repair with confidence.

Start with the basics: scan the code, check your fluid, and do a visual inspection. For many owners, replacing the secondary shaft speed sensor resolves the problem and restores smooth shifting. Remember, addressing this code quickly protects your transmission and keeps your Odyssey running reliably for many more family miles. If you’re ever in doubt, consulting a trusted mechanic ensures the job is done right.