C1709 on 2014-2015 Infiniti Q70: TPMS 'No Data' Causes and Fixes

What's Unique About the 2014-2015 Infiniti Q70

For this generation of Infiniti vehicles (Y51 platform), including the Q70, the manufacturer has specifically acknowledged that aftermarket electronic accessories can cause radio frequency (RF) interference that blocks the TPMS sensor signals. This is documented in Technical Service Bulletin ITB13039A (also listed as NTB13-088a). Owners on forums for related models like the G37 have confirmed that cheap or poorly-shielded USB chargers are often the culprit. This makes unplugging all 12V devices a crucial 🎬 Watch: How cellphones and chargers create TPMS interference and free first diagnostic step.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• TPMS warning light flashes for about one minute at startup, then stays on solid.
• Vehicle information display shows dashes (--) or a warning message for the front right tire's pressure reading.
• Inability to see the front right tire pressure reading on the central display.
• A 'Check Tire Pressure' message may appear in the vehicle information display.

Most Likely Causes

1. Dead TPMS Sensor Battery 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor TPMS sensor batteries have a finite, non-replaceable lifespan, typically 5-10 years. For a 2014-2015 vehicle, the original sensors are at or near the end of their expected service life, making this the most common cause.
   How to confirm: A professional tire shop can use a TPMS diagnostic tool (like an Autel or Bartec) to attempt to read the sensor's signal and battery status directly at the wheel. If the tool cannot get a reading or shows a low battery status, the sensor is dead.
   Typical fix: Replace the front right TPMS sensor and perform the TPMS relearn/registration procedure. It is highly recommended to replace all four sensors at the same time, as the others are likely to fail soon.
   Est. part cost: $40-$120
2. Radio Frequency (RF) Interference 🟡 Medium Probability As noted in Infiniti TSB ITB13039A, aftermarket devices plugged into the 12V power outlets (e.g., phone chargers, dash cams, power inverters, wireless charging docks) can emit RF noise that disrupts the 315 MHz TPMS sensor signals. The TPMS receiver is often located near the glove box, in close proximity to these power outlets, increasing susceptibility.
   How to confirm: Unplug all aftermarket electronic devices from the vehicle's power sockets. Clear the codes if possible, then drive the vehicle for a few minutes (above 16-25 mph) to see if the TPMS light turns off and the code clears. If it does, one of the devices was the cause.
   Typical fix: Remove or replace the interfering device with a higher-quality, better-shielded alternative. This is a no-cost diagnostic step that should always be performed first.
   Est. part cost: $0
3. Faulty TPMS Sensor ⚪ Low Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor Beyond a dead battery, the sensor's electronics can fail from manufacturing defects, or it can be physically damaged during a tire change or from road impacts.
   How to confirm: If a TPMS tool can read the sensor's ID but it still won't register with the car (and RF interference is ruled out), the sensor itself may be faulty.
   Typical fix: Replace the front right TPMS sensor and register the new sensor ID with the vehicle. 🎬 Watch: How to reset TPMS on Infiniti cars without tools
   Est. part cost: $40-$120

Rare But Worth Checking

• Faulty TPMS Control Unit / BCM: If a new, known-good sensor has been installed and registered but the C1709 code persists (or if all four sensor codes C1708, C1709, C1710, C1711 appear at once), the issue could be with the Body Control Module (BCM) or the dedicated TPMS receiver module. A user on the MyG37.com forum fixed a multi-sensor failure by replacing the TPMS receiver module (P/N 40740-1NC2A on a G37) located behind the glove box. This is a very expensive repair, with the module alone costing over $1,400.
• Failing HVAC Blower Motor: → Shop HVAC Blower Motor A failing HVAC blower motor can generate significant RF interference that disrupts TPMS signals. Nissan TSB NTB19-062 for the related 370Z and GT-R platforms identifies this as a specific cause for C170x codes. If the TPMS light only comes on when the heat or A/C is running, this is a possible, though rare, cause.

Diagnosis Steps

1. Verify the code is C1709 using an OBD-II scanner with ABS/Chassis capabilities.
2. Unplug ALL aftermarket accessories from 12V power outlets (phone chargers, dash cams, etc.).
3. Drive the vehicle for 5-10 minutes at speeds above 16 mph to see if the system resets and the light goes out. If it does, one of the accessories was causing RF interference.
4. If the light remains, take the vehicle to a tire shop. They will use a TPMS diagnostic tool to check the signal strength and battery status of the front right sensor.
5. If the tool confirms the sensor is dead or not transmitting, replace the front right TPMS sensor. Consider replacing all four if they are original.
6. After replacement, the new sensor's unique ID must be registered to the vehicle's BCM using a TPMS tool via the OBD-II port.
7. Confirm the TPMS light is off and the vehicle can read the pressure from the new sensor on the information display.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #40700-1LA0E) — This is the 315 MHz sensor and transmitter unit inside the front right wheel. Its internal, non-replaceable battery is the most common failure point, causing the C1709 'No Data' code. The part number 40700-1LA0E supersedes 40700-1LA0A, 40700-1LA0B, 40700-1LA0C, and 40700-1LA0D.
  Trusted brands: OEM Nissan/Infiniti, Schrader (often the OEM manufacturer), Huf, Autel (programmable), Dorman
  OEM price range: $80-$115
  Aftermarket price range: $40-$80

Related Codes That Often Appear With This One

• C1708 — This code is for the Front Left wheel. Seeing both C1708 and C1709 may indicate that both front sensors are failing around the same time due to age, or a system-wide issue like RF interference.
• C1710 — This code is for the Rear Right wheel. Seeing multiple codes (C1708, C1709, C1710, C1711) simultaneously points strongly toward a central issue like RF interference or a faulty TPMS receiver module.
• C1711 — This code is for the Rear Left wheel. It is less common to see with C1709 unless wheels were rotated without re-registering sensor positions or there is a system-wide problem.

Technical Service Bulletins (TSBs) & Recalls

• ITB13039A / NTB13-088a: Details diagnosing TPMS systems and specifically calls out radio frequency interference as a primary cause for 'No Data' codes like C1709.
• NTB19-062: While for the 2018 370Z/GT-R, this TSB is relevant as it identifies a failing HVAC blower motor as a source of RF interference that can cause the same C170x TPMS codes.

Platform-Specific Known Issues

• Infiniti has issued TSB #ITB13039A which explicitly states that radio frequency interference from aftermarket accessories can cause a 'No Data' condition, leading to codes C1708, C1709, C1710, and C1711.
• A user on the MyG37.com forum, a platform-mate, successfully resolved an issue where all four TPMS sensors were reporting 'No Data' by replacing the central TPMS Control Unit/Receiver, located behind the glove box.

Mechanic-Grade Diagnostic Values

• DIY Manual Relearn Tire Pressures — expected: Front-Right: 34 PSI, Front-Left: 31 PSI, Rear-Left: 28 PSI, Rear-Right: 26 PSI. These specific, staggered pressures are required for the system to identify each sensor's position without a scan tool.. Failure: The system will not enter or complete the learning mode if the pressures are not set to these distinct values before initiating the procedure.
• DTC Confirmation Drive Cycle — expected: Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then continue driving normally for at least 10 minutes.. Failure: If the code C1709 (or related codes) is still present after this drive cycle, the fault is confirmed to be active.
• TPMS Sensor Signal Frequency — expected: 315 MHz. Failure: A TPMS diagnostic tool will show 'No Signal' or fail to activate the sensor if it is not transmitting.

Scan Tool Commands That Help

• Infiniti CONSULT-III / CONSULT 3+: ID REGIST (Work Support) — This is the primary function used after replacing a TPMS sensor. It allows the technician to manually enter the new sensor's unique ID and write it to the BCM's memory, which is required for the vehicle to recognize the new part.
• Infiniti CONSULT-III / CONSULT 3+: DATA MONITOR (for AIR PRESSURE MONITOR) — This function is used to view live data from the TPMS, including the reported pressure from each recognized sensor. It is used to confirm that a sensor is communicating correctly after registration or during diagnosis.

Wiring & Ground Locations

• Body Control Module (BCM) — Located in the passenger-side kick panel area, often behind the glove box.. The BCM acts as the receiver for the TPMS sensor signals. A loose connector, corrosion from water damage, or a faulty ground for the BCM can prevent it from receiving signals, potentially causing C1709 or multiple TPMS codes simultaneously.
• Tire Pressure Warning Check Connector — On some older Nissan/Infiniti models, this is a single-wire connector taped to the harness near the OBD-II port or, in some cases, tucked away on the passenger side.. This connector allows for a manual (no-tool) relearn procedure by grounding the pin multiple times to put the BCM into learning mode. However, this connector was phased out on later models (approx. 2011+), making a scan tool the only method for registration on the 2014-2015 Q70.

OEM Part Supersession History

• 40700-1LA0A, 40700-1LA0B, 40700-1LA0C, 40700-1LA0D → 40700-1LA0E — Standard part revision and improvement by the manufacturer.
  Heads up: While other Nissan TPMS sensors like 40700-3AN1A or 40700-3AN1B may look physically similar, they are intended for different models (e.g., Sentra, Leaf) and may not be compatible. Always verify the part number against the vehicle's VIN. Using the wrong sensor may result in a failure to register.

Model Year Variations Within This Range

• 2014 vs 2015: No specific changes to the TPMS system for the Q70 are documented between these two model years. However, on the related Q50 platform, the 2015 model received a faster infotainment system and other minor electronic bug fixes compared to the 2014 model, indicating that subtle year-over-year electronic revisions are possible.