P0707 on 2016-2022 Honda HR-V: Transmission Range Sensor Circuit Low Causes and Fixes

What's Unique About the 2016-2022 Honda HR-V

The 2016-2022 Honda HR-V uses a Continuously Variable Transmission (CVT). While the P0707 code is common across many vehicles, on this platform it almost always points directly to the externally mounted Transmission Range Sensor. Unlike some vehicles where this sensor is inside the transmission oil pan, the HR-V's sensor is more accessible, making diagnosis and replacement more straightforward. Owners report that using a genuine Honda OEM sensor is critical, as aftermarket versions can be unreliable.

Symptoms You May Notice

• Check Engine Light is on
• Vehicle will not start
• Inability to shift out of Park
• Erratic or harsh shifting
• Transmission enters 'limp mode' (stuck in one gear)
• Dashboard gear indicator (PRNDL) may be incorrect or not illuminated
• Delayed or sluggish gear engagement

Most Likely Causes

1. Faulty Transmission Range Sensor (Neutral Safety Switch) 🔴 High Probability → Shop Transmission Assembly The sensor is an electronic component exposed to heat and moisture in the engine bay, which can lead to internal failure over time. Water intrusion into the sensor housing is a known failure mode.
   How to confirm: Use a multimeter to test the voltage output of the sensor at the electrical connector while moving the gear selector. Compare the readings to the specifications in the factory service manual. A reading below the minimum threshold (typically <0.5V) confirms a faulty sensor. A scan tool can also be used to monitor live data from the sensor.
   Typical fix: Replace the Transmission Range Sensor. This typically involves removing the battery and air intake box for access. It is mounted on the top/front of the CVT.
   Est. part cost: $130-$195
2. Damaged Wiring or Corroded Connector 🟡 Medium Probability The wiring harness leading to the transmission can be exposed to road debris, moisture, and engine heat, potentially causing chafing, breaks, or corrosion in the connector pins.
   How to confirm: Visually inspect the wiring harness and the connector for any signs of damage, corrosion (green crust), or loose pins. Perform a continuity test from the sensor connector to the PCM connector to check for opens or shorts in the circuit.
   Typical fix: Repair the damaged section of wiring or clean the connector terminals with electrical contact cleaner. If damage is severe, the connector pigtail may need to be replaced.
   Est. part cost: $10-$50

Rare But Worth Checking

• Faulty Powertrain Control Module (PCM): This is very rare. The PCM should only be considered after the sensor and wiring have been thoroughly tested and proven to be good.
• Misadjusted Shift Linkage: If recent transmission work has been performed, it's possible the shift linkage was not correctly aligned with the new sensor, causing it to send an incorrect signal.
• Low or Dirty Transmission Fluid: → Shop Transmission Assembly While less common for a specific circuit code, extremely low or degraded CVT fluid can cause a variety of transmission issues and codes. It's a crucial maintenance item to check first. Honda's Maintenance Minder system typically suggests a fluid change between 30,000 and 60,000 miles.

Diagnosis Steps

1. Connect an OBD-II scanner to verify the P0707 code is present and check for any other related transmission codes.
2. Check the transmission fluid level and condition. The fluid should be Honda HCF-2 specific fluid. Low or dirty fluid can sometimes cause erratic behavior, though it's less likely to cause this specific circuit code.
3. Visually inspect the Transmission Range Sensor's electrical connector and wiring harness for any obvious signs of damage, corrosion, or loose connections. The sensor is located on the top of the transmission, accessible after removing the air intake assembly.
4. Using a scan tool that can display live data, monitor the voltage from the Transmission Range Sensor while moving the shifter through all gears. Look for a signal that is consistently below the manufacturer's specification (usually under 0.5 volts).
5. If a scan tool is not available, use a multimeter to back-probe the signal wire at the sensor's connector. Check for the correct voltage in each gear position according to the vehicle's service manual.
6. If the voltage is low or absent directly from the sensor, the sensor itself is likely faulty.
7. If the sensor's output is correct, perform a continuity test on the wiring between the sensor connector and the PCM to rule out an open or short circuit.
8. If both the sensor and wiring test good, the issue may be with the PCM, but this is extremely rare and should be the last consideration.

Parts You'll Likely Need

• Transmission Range Sensor (Neutral Safety Switch) (OEM #28900-R9L-004) — This sensor is the most common failure point for the P0707 code on the HR-V.
  Trusted brands: Honda (Genuine OEM)
  OEM price range: $130-$195
  Aftermarket price range: $50-$150

Related Codes That Often Appear With This One

• P0705 — P0705 indicates a general malfunction in the range sensor circuit, while P0707 specifically points to a low voltage condition. They can appear together if the sensor is failing intermittently.
• P0706 — This code indicates a range/performance problem with the sensor. It can appear with P0707 if the signal is erratic and not just consistently low.
• P0708 — This is the opposite of P0707, indicating a high voltage signal. Seeing both P0707 and P0708 intermittently strongly suggests a chafed wire that is shorting to both ground and a power source.

Technical Service Bulletins (TSBs) & Recalls

• TSB 21-047: Warranty Extension: 2016-20 HR-V CVT Premature Belt Deterioration. While not directly for P0707, this TSB addresses a known issue with the CVT belt. A failing transmission could potentially send debris or cause issues that might affect sensor readings, although this is not the primary cause of a P0707 code.

Platform-Specific Known Issues

• Owner Experience: No-Start Condition: A common owner complaint associated with P0707 is an intermittent or complete no-start condition. The engine will not crank because the PCM does not receive a valid signal that the transmission is in Park or Neutral. Often, all dashboard lights will illuminate as normal, but turning the key or pressing the start button results in no action from the starter.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Premature CVT Belt Deterioration 🔴 High — Common enough to warrant a warranty extension (TSB 21-047) for 2016-2020 models. Can lead to slipping, noise, and eventual transmission failure. (Ref: TSB 21-047)
• Failing Engine Start/Stop Switch 🟠 Medium — A known issue on 2016-2018 models causing a no-start condition, often with a 'KEYLESS START SYSTEM ERROR' message and DTC B12C5. (Ref: TSB 20-116 (Warranty Extension))
• Starter Motor Failure 🟠 Medium — Many owners report intermittent or complete starter failure at relatively low mileage, presenting as a no-crank, no-start condition.
• Fuel Pump Failure 🔴 High — Affects 2018-2020 models, leading to engine stalling or failure to start. This was subject to a safety recall. (Ref: NHTSA Recall 20V-314)
• Rear View Camera Failure 🟡 Low — A recall was issued for 2019-2022 models where the rearview camera image may not display when starting the vehicle. (Ref: NHTSA Recall 23V-046)

Real Owner Stories

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

Related OBD-II Codes

• P0706 — Often appears alongside P0707 as a related transmission range sensor range/performance code, frequently discussed on HR-V owner forums.
• B12C5 — Associated with the Engine Start/Stop Switch failure (TSB 20-116); like P0707, it can cause a no-start condition in 2016-2018 HR-V models.
• P0705 — A companion transmission range sensor circuit code that may trigger due to the same moisture intrusion or wiring corrosion issues affecting the P0707 circuit.
• U0101 — Lost communication with TCM; may occur if the wiring harness or connector pins leading to the transmission are severely corroded or damaged.

Frequently Asked Questions