C1709 on 2008-2013 Infiniti G37: TPMS Sensor Fault Causes and Fixes

What's Unique About the 2008-2013 Infiniti G37

For the V36 generation G37, the original equipment TPMS sensors from this era have an internal, non-replaceable battery with a typical lifespan of 7-10 years. As these vehicles have aged, sensor failure due to a dead battery is the most common maintenance issue related to the TPMS. Additionally, Infiniti issued TSB ITB13039A, highlighting that these systems are sensitive to radio frequency (RF) interference from aftermarket electronics like phone chargers, which can block the 315 MHz sensor signal and mimic a failed sensor. A separate TSB for the related Nissan 370Z (NTB19-062) even identified a faulty HVAC blower motor as a potential, though rare, source of interference causing C1709.

Diagnostic Flowchart

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

Symptoms You May Notice

• The TPMS warning light on the dashboard flashes for approximately one minute after startup, then stays on solid. This sequence 🎬 Watch: How to diagnose a TPMS light that won't reset specifically indicates a system fault, not low pressure.
• The vehicle's tire pressure information display, if equipped, shows dashes ('--') or is blank for the front-right tire.

Most Likely Causes

1. Dead Battery in Front-Right TPMS Sensor 🔴 High Probability The non-replaceable batteries inside the original sensors have a 7-10 year lifespan. Vehicles in this 2008-2013 range are now well beyond that age, making battery failure the primary cause.
   How to confirm: Use a TPMS activation tool (e.g., Autel, Bartec) to attempt to 'wake' or read the sensor. If the tool gets no response or shows a low/dead battery status (e.g., <15 months remaining life), the sensor has failed. Tire shops will often perform this check for free.
   Typical fix: Replace the front-right TPMS sensor. The new sensor's ID must then be registered to the BCM using a TPMS tool. It is often recommended to replace all four sensors at once if they are original, as the others are likely to fail soon.
   Est. part cost: $35-$100
2. Radio Frequency (RF) Interference 🟡 Medium Probability As noted in TSB ITB13039A, aftermarket devices (especially cheap or poorly-shielded phone chargers, dash cams, and GPS units) plugged into the 12V outlets can emit RF noise that blocks the 315 MHz signal from the TPMS sensor.
   How to confirm: Unplug ALL aftermarket accessories from the vehicle's power outlets. Clear the codes (if possible) and drive the car for 10-15 minutes at speeds above 25 MPH. If the light does not return, one of the accessories was the cause. This is a zero-cost diagnostic step that should always be performed first.
   Typical fix: Remove or replace the interfering electronic device. Using a high-quality, well-shielded charger can prevent the issue.
   Est. part cost: $0
3. Failed TPMS Sensor (Electronic/Physical Fault) ⚪ Low Probability Beyond the battery, the sensor's electronics can fail from age, moisture, or physical damage from potholes or improper handling during tire service. Corrosion of the aluminum valve stem, especially in salt-belt regions, is a known issue that can damage the sensor or cause leaks.
   How to confirm: If a TPMS tool shows the sensor has a good battery but still won't communicate with the vehicle, or if it provides erratic data, the sensor itself has failed. Visual inspection after dismounting the tire may show corrosion or damage.
   Typical fix: Replace the front-right TPMS sensor and register the new ID.
   Est. part cost: $35-$100

Rare But Worth Checking

• Faulty Body Control Module (BCM) or TPMS Receiver: This is very uncommon. Before suspecting the BCM, all sensors and potential RF interference should be thoroughly ruled out. A failure here would likely affect more than one sensor, often setting codes C1708, C1710, and C1711 simultaneously. A MyG37.com user fixed a persistent issue with all four 'No Data' codes by replacing the separate TPMS receiver module (P/N 40740-1NC2A) located behind the glove box. BCM failure can also be caused by water intrusion from clogged sunroof drains.
• Wiring Harness Damage: Damage to the wiring between the TPMS receiver and the BCM could cause a loss of signal. This is rare and usually results from other repairs (like a sloppy aftermarket remote starter installation), accidents, or rodent damage. Corrosion at the BCM connector due to water leaks is also a possibility.
• Faulty HVAC Blower Motor: Extremely rare, but documented in Nissan TSB NTB19-062 for the related 370Z. A failing blower motor can create enough RF interference to block TPMS signals, triggering 'No Data' codes like C1709. The diagnostic step is to see if the code appears during a road test with the HVAC on max cool.

Diagnosis Steps

1. Confirm the symptom: The TPMS light should flash for about a minute at startup before going solid. This indicates a system fault.
2. Unplug all aftermarket devices (phone chargers, dash cams, etc.) from 12V power sockets to eliminate Radio Frequency interference. This is a critical first step.
3. Clear the DTCs with a capable scanner and drive the vehicle for at least 10 minutes above 25 MPH to see if the code returns. If it does not, an accessory was the cause.
4. If the code returns, use a TPMS activation tool at the front-right wheel to attempt to read the sensor's ID, pressure, and battery status.
5. If the tool cannot get a response from the sensor, the sensor has failed (likely a dead battery) and must be replaced.
6. If the tool can read the sensor, use a scanner to verify that the sensor's ID is correctly registered to the BCM. If not, perform the TPMS registration procedure.
7. As a DIY alternative for registration on early models (approx. 2008-2010), some owners have successfully used a 'paper clip method' to put the BCM in learn mode by grounding a specific pin on a connector near the OBD-II port, then driving the car. Note: This connector may be absent 🎬 See this walkthrough of the DIY paper clip reset method on 2011+ models.
8. If the sensor reads fine and is registered correctly, but the code persists (especially if multiple TPMS codes are present), investigate rare causes like a faulty TPMS receiver module behind the glovebox or wiring issues.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #40700-1LA0E) — This is the component that fails, typically due to its integrated battery reaching the end of its 7-10 year service life. The entire unit must be replaced. Note that this part number is for models built on or after 03/2010 and supersedes older versions like 40700-1LA0A/B/C/D. Earlier models (2008-early 2010) use a different part, like 40700-JK00C.
  Trusted brands: OEM Infiniti/Nissan, Huf (OEM supplier), Denso, Schrader, Continental
  OEM price range: $65-$105
  Aftermarket price range: $35-$60

Related Codes That Often Appear With This One

• C1708 — This code indicates the same 'No Data' fault but for the front-left sensor. Seeing them together suggests multiple sensors are failing around the same time due to age.
• C1710 — This code indicates the same 'No Data' fault but for the rear-right sensor. Seeing multiple codes points to a systemic issue, like multiple dead sensor batteries or significant RF interference.
• C1711 — This code indicates the same 'No Data' fault but for the rear-left sensor. A forum user reported seeing all four codes (C1708, C1709, C1710, C1711) when their TPMS receiver module failed.

Technical Service Bulletins (TSBs) & Recalls

• ITB13039A / NTB13-088a - Low Tire Pressure Warning System; Service Information: This TSB provides general diagnostic information for the TPMS, and specifically calls out RF interference from devices like 'smart cell phone chargers' as a potential cause for a 'No Data' condition (C1709).
• NTB19-062 - 2018 370Z AND GT-R; TPMS LIGHT ON WITH DTC STORED: While for a different model year, this TSB for the G37's platform-mate identifies a faulty HVAC blower motor as a potential source of RF interference that can cause TPMS codes C1708-C1711.

Platform-Specific Known Issues

• Infiniti TSB ITB13039A explicitly warns that radio frequency interference from aftermarket electronics can cause a 'No Data' condition, setting codes C1708, C1709, C1710, or C1711.
• A DIY-friendly TPMS relearn procedure exists for early models, which involves grounding a single-pin connector found near the OBD-II port. This puts the BCM into learning mode, allowing new sensors to be registered by driving. However, this connector was reportedly removed from later models (approx. 2011+), making a scan tool mandatory.

Mechanic-Grade Diagnostic Values

• BCM Power Supply and Ground — expected: Check for battery voltage at the appropriate power input pins and continuity to ground on the ground pins of the BCM harness connector (e.g., M122, M123).. Failure: Absence of voltage or lack of continuity to ground indicates a wiring or fuse issue upstream of the BCM. This is a valid check if the BCM is suspected of failure.

Scan Tool Commands That Help

• Nissan CONSULT-III / CONSULT 3+: ID Registration (under Work Support) — This is the official dealer procedure used to write new TPMS sensor IDs to the BCM after a sensor is replaced. The tool is put into 'execution mode' to register each sensor sequentially.
• Autel, Bartec, or similar professional TPMS tool: OBD Relearn / Position Relearn — Used to register new sensor IDs to the BCM via the OBD-II port. The process typically involves using the tool to first 'trigger' or activate each sensor at the wheel, and then connecting the tool to the car to write all four new IDs to the vehicle's computer.

Wiring & Ground Locations

• TPMS Receiver / Antenna — Located behind the glove box compartment. It is a small black box, part number 40740-1NC2A for models from 03/2010 onward.. This module is the actual radio receiver that listens for signals from all four TPMS sensors. If this module fails, it can cause 'No Data' codes for one or all sensors (C1708-C1711) even if the sensors and BCM are perfectly fine.
• TPMS Reset Connector (Early Models) — A single-wire white female plug, taped to the main OBD-II port wiring harness, located under the dash near the driver's left knee.. On early models (approx. 2008-2010), grounding this wire puts the BCM into a diagnostic or relearn mode, which is a well-documented DIY procedure. This connector is reportedly absent on later models (2011+).
• Body Control Module (BCM) — Located in the passenger side footwell, typically behind the kick panel.. The BCM is the main control unit for the TPMS. It is notoriously vulnerable to water damage from clogged sunroof drains, which can cause corrosion on the connectors and lead to a host of electrical issues, including TPMS failures.

Real Owner Repair Stories

• MyG37.com forum user 'milosz' (2013 Infiniti G37x) — TPMS light flashing then solid, with all four 'No Data' codes present (C1708, C1709, C1710, C1711).
  ❌ Tried (didn't work) Initial diagnosis pointed towards the BCM, but further investigation suggested a component between the sensors and the BCM.
  ✅ What actually fixed it Replacing the separate TPMS radio transceiver module (often called the 'TPMS Antenna'), part number 40740-1NC2A, located behind the glove box. After replacement and clearing codes, the TPMS light went out.
• ALLDATA Tech Tip (for similar Nissan system) (2008 Nissan Versa) — TPMS light flashing then solid, code C1709 present.
  ❌ Tried (didn't work) Verifying tire pressures were correct., Re-initializing the existing sensors. This fixed the issue for one week before the light returned.
  ✅ What actually fixed it A TPMS tool revealed the original sensors had low remaining battery life (<15 months). Replacing all four TPMS sensors and registering the new IDs permanently resolved the intermittent C1709 code.

OEM Part Supersession History

• 40700-JK00A, 40700-JK00B, 40700-JK00C → 40700-1LA0E (or superseding versions like 1LA0A/B/C/D) — Part revision and consolidation by the manufacturer.
  Heads up: There is a hard split. Sensors for vehicles built before 03/2010 (e.g., 40700-JK00C) are different from those for vehicles built on or after 03/2010 (e.g., 40700-1LA0E). While they are all 315 MHz, using the wrong part for the model year range may lead to programming issues.

Model Year Variations Within This Range

• 2008 - early 2010 (before 03/2010): Uses earlier TPMS sensor part numbers (e.g., 40700-JK00C). Likely includes the single-pin TPMS reset connector near the OBD-II port for DIY relearn procedures.
• late 2010 - 2013 (on or after 03/2010): Uses later TPMS sensor part numbers (e.g., 40700-1LA0E). The DIY TPMS reset connector is reportedly removed, making a scan tool mandatory for registering new sensors. Uses TPMS Receiver module P/N 40740-1NC2A.