P0707 on 2003-2013 Honda Accord: Transmission Range Sensor Fixes

What's Unique About the 2003-2013 Honda Accord

For the 7th and 8th generation Honda Accord, the transmission range sensor is an external component mounted on the transmission case. Its location can expose it to significant heat and road spray, which may contribute to a higher rate of failure over time compared to more protected sensors. Owners frequently report that replacing this single sensor resolves the P0707 code and associated starting or shifting issues. 🎬 Watch: How to fix a no-start and blinking D light This issue is common across both 4-cylinder and V6 models.

Generation note: This guide covers the 7th generation (2003-2007) and 8th generation (2008-2012) Honda Accord. The function and common failure of the transmission range sensor are similar across these generations, though the specific part number differs. The 7th gen V6 models, in particular, are also known for premature automatic transmission failure, which is a separate and more severe issue.

Symptoms You May Notice

• Engine will not start, especially when in Park or Neutral
• Check Engine Light is on
• Flashing 'D' (Drive) indicator light on the instrument cluster
• Transmission may not shift properly or may shift erratically
• Vehicle enters 'limp mode' (stuck in a single gear)
• Inability to shift the gear selector out of Park
• Decreased fuel economy
• Reverse lights may not illuminate

Most Likely Causes

1. Faulty Transmission Range Sensor (Neutral Safety Switch) 🔴 High Probability → Shop Transmission Assembly The sensor's external placement on the transmission makes it vulnerable to heat, moisture, and road debris, which can lead to premature internal failure or corrosion.
   How to confirm: Use a multimeter to test for correct voltage output from the sensor as the gear selector is moved through each position. Or, use an advanced scan tool to monitor the sensor's live data; a reading stuck below 0.5V or an unchanging value when shifting indicates a problem.
   Typical fix: Replace the transmission range sensor. Ensure the new sensor is properly aligned during installation, 🎬 Watch: Step-by-step transmission range sensor replacement tutorial typically by shifting to Neutral and aligning marks on the sensor body and shaft.
   Est. part cost: $50 - $150
2. Corroded or Damaged Wiring/Connector 🟡 Medium Probability Moisture and road salt can get into the sensor's connector, causing corrosion ('green crust') on the pins or a short to ground, which drops the voltage signal. This can happen after driving through deep puddles or from pressure washing the engine bay.
   How to confirm: Visually inspect the sensor's electrical connector and nearby wiring for any signs of corrosion, damage, or loose connections. Disconnect it and check for bent or pushed-back pins. Perform a 'wiggle test' on the harness while monitoring sensor voltage to see if the reading changes.
   Typical fix: Clean the connector terminals with an electrical contact cleaner or repair/replace the damaged section of the wiring harness. Apply dielectric grease upon reassembly to prevent future moisture intrusion.
   Est. part cost: $5 - $50
3. Misadjusted Transmission Range Sensor or Shift Linkage ⚪ Low Probability → Shop Transmission Assembly
   How to confirm: Ensure the shift linkage is properly connected and not loose. When installing a new sensor, it must be correctly aligned. This usually involves placing the shifter in Neutral and aligning marks on the sensor and the transmission case.
   Typical fix: Adjust the sensor or shift linkage to the correct position.
   Est. part cost: $0

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): This is very rare. Before condemning the PCM, all other possibilities, including the sensor, wiring, and connections, must be exhaustively tested and ruled out.
• Low System Voltage: A failing battery or a bad main ground can lower the overall system voltage, potentially causing the PCM to incorrectly flag a P0707 code on a healthy sensor circuit. If other electrical-related codes are present, diagnose the battery and charging system first.

Diagnosis Steps

1. Read the code with an OBD-II scanner and check for any other related transmission or electrical codes.
2. Check the transmission fluid level and condition. Burnt or low fluid can cause a variety of transmission issues, though it's less likely to be the direct cause of a P0707.
3. Locate the transmission range sensor on the exterior 🎬 See this video to locate the sensor on 8th Gen Accords of the transmission case. Visually inspect the sensor, its electrical connector, and the wiring harness for any obvious signs of damage, corrosion, or loose connections.
4. Disconnect the connector and inspect the pins for corrosion (green crust) or being bent/pushed back. Clean if necessary.
5. Using a scan tool that can read live data, monitor the voltage from the transmission range sensor while moving the gear selector through all positions (P, R, N, D, etc.). The voltage should change distinctly for each gear. A reading stuck below ~0.5 volts points to the problem.
6. If a scan tool is unavailable, use a digital multimeter to back-probe the signal wire at the sensor's connector and check for the correct voltage specifications as per the vehicle's service manual.
7. If the sensor and wiring appear to be good, check the adjustment of the shift linkage to ensure it is moving the sensor through its full range of motion.
8. If the sensor has been replaced and the wiring is confirmed to be good, the final step would be to investigate the PCM, though this is an extremely unlikely cause.

Parts You'll Likely Need

• Transmission Range Sensor / Neutral Safety Switch (OEM #28900-RYF-023 (8th Gen, 2008-2012), 28900-PPV-023 / 28900-RCR-013 (7th Gen, 2003-2007, check VIN)) — This sensor is the most common failure point for a P0707 code due to wear and tear and its exposure to the elements.
  Trusted brands: Honda (OEM), Standard Motor Products, Dorman, Beck/Arnley
  OEM price range: $120-$200
  Aftermarket price range: $50-$150

Related Codes That Often Appear With This One

• P0705 — P0705 indicates a general circuit malfunction for the range sensor, while P0707 specifically points to a low voltage condition. They can appear together if the sensor is failing intermittently.
• P0706 — This code means the sensor's signal is out of range or has a performance problem, which can occur alongside P0707 if the signal is erratic and not just consistently low.
• P0708 — This is the opposite of P0707, indicating a high voltage signal. Seeing P0707 and P0708 intermittently strongly suggests a wiring issue where a wire is chafing and shorting to both ground and a power source.

Platform-Specific Known Issues

• On 7th generation (2003-2007) V6 models, the 5-speed automatic transmission (codename BAYA/MAYA) has a very high failure rate, often before 100,000 miles. While P0707 is usually the sensor, be aware that other codes like P0730 (Incorrect Gear Ratio) often signal catastrophic internal failure requiring a rebuild or replacement.
• For 8th generation (2008-2012) models with the 4-cylinder K24 engine, a common issue is a rattling noise from the VTC actuator on cold starts. This is a separate issue from P0707 but is a well-known problem for this engine.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Automatic Transmission Failure (7th Gen V6) 🔴 High → Shop Transmission Assembly — Very common on 2003-2004 models, less so on 2005-2007 but still a significant weak point. Often fails before 120,000 miles. (Ref: NHTSA Recall #04V176000 was issued for a defect that could cause the transmission to lock up.)
• Excessive Oil Consumption (8th Gen V6 and some I4) 🟠 Medium — Widespread issue, particularly on V6 models with Variable Cylinder Management (VCM). Led to a class-action lawsuit. (Ref: Honda settled a class-action lawsuit and extended the powertrain warranty for affected vehicles.)
• VTC Actuator Rattle on Cold Start (8th Gen I4) 🟠 Medium — Extremely common on the K24Z engines. A loud grinding or rattling noise for ~2 seconds on a cold start. (Ref: Honda TSB 09-010 addresses this issue.)
• Cracked Front Compliance Bushings 🟡 Low — Very common across both generations after 80,000-100,000 miles. Causes clunking noises from the front suspension and can affect alignment.
• Power Steering Hose Leak (7th Gen V6) 🔴 High — Common enough to warrant a recall. The hose deteriorates from engine heat, leaking fluid onto the hot catalytic converter, creating a fire risk. (Ref: Honda recalled 2003-2007 Accord V6 models to replace the hose.)

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P0708 — Transmission Range Sensor Circuit High Input; often appears alongside P0707 when there is a failing sensor or a significant wiring harness issue.
• P1717 — Transmission Range Sensor (Neutral Safety Switch) 'In-Between' position error; frequently seen with P0707 on Honda/Acura platforms when the sensor signal is intermittent or misaligned.
• P0730 — Incorrect Gear Ratio; while P0707 is a sensor circuit code, P0730 often appears on 7th Gen V6 Accords signaling catastrophic internal transmission failure.
• P0700 — General Transmission Control System Malfunction; a generic code that often triggers when specific faults like P0707 are detected by the TCM.

Frequently Asked Questions