C1711 on 2014-2016 Infiniti QX70: Rear Left TPMS Sensor Failure Causes and Fixes

What's Unique About the 2014-2016 Infiniti QX70

For this generation of Infiniti vehicles, the manufacturer issued a Technical Service Bulletin (TSB) acknowledging that C1711 and related codes can be triggered by radio frequency (RF) interference. This means that aftermarket electronic devices, such as phone chargers, dash cams, or power inverters plugged into the 12V outlets, can sometimes disrupt the 315MHz signal from the TPMS sensor, causing the code to appear. While a dead sensor is still the most likely cause, the possibility of RF interference is a well-documented and warrantable quirk for this platform that should be investigated first.

Diagnostic Flowchart

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

Symptoms You May Notice

• Flashing TPMS warning light on the instrument cluster (flashes for about one minute upon startup, then stays on solid).
🎬 Watch: Understanding the blinking TPMS light on your Infiniti.
• The vehicle information display shows dashes (--) or is blank for the rear left tire pressure reading.
• "Check Tire Pressure" message may appear on the information display.

Most Likely Causes

1. Dead TPMS Sensor Battery 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor TPMS sensors contain a non-replaceable battery with a finite lifespan, typically 7-10 years. Vehicles from the 2014-2016 model years are now at an age where battery failure is the most common cause of a sensor failing to transmit.
   How to confirm: A technician can use a TPMS diagnostic tool (like an ATEQ VT55 or similar) to attempt to 'wake up' or read the sensor. If the tool cannot get a response from the rear left sensor but can from the other three, the sensor has failed.
   Typical fix: Replace the TPMS sensor in the rear left wheel and perform the TPMS registration procedure to program the new sensor ID to the BCM.
   Est. part cost: $40-$115
2. Radio Frequency (RF) Interference 🟡 Medium Probability As noted in Infiniti TSB #ITB13039A, these vehicles can be sensitive to RF interference from aftermarket electronics plugged into the power outlets (e.g., 'smart' phone chargers, dash cams, power inverters). The interference disrupts the signal from the sensor to the receiver.
   How to confirm: Unplug all aftermarket electronic devices from the vehicle's power sockets. Clear the code (if possible) or drive the vehicle for 15-20 minutes at speeds over 25 MPH to see if the light extinguishes and communication is restored. If the problem disappears, one of the devices was the cause.
   Typical fix: Remove or replace the interfering electronic device. No parts replacement on the vehicle is necessary.
   Est. part cost: $0
3. Damaged TPMS Sensor ⚪ Low Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor
   How to confirm: Visual inspection of the sensor after dismounting the tire. Damage can occur from hitting a large pothole, curb, or during a tire change if the technician is not careful.
   Typical fix: Replace the damaged TPMS sensor.
   Est. part cost: $40-$115

Rare But Worth Checking

• Faulty TPMS Control Module (Receiver): This is rare. If multiple TPMS codes for different wheels are present (e.g., C1708, C1709, C1710, C1711), or if a new, correctly registered sensor still won't communicate, the module itself could be the issue. On related platforms like the G37, this module is located behind the glove box and can be replaced independently. A failure here would likely result in a 'Connection Failure' when attempting to register sensors with a scan tool.

Diagnosis Steps

1. Verify the symptom: Note if the TPMS light flashes for one minute at startup before turning solid. This indicates a system fault, not low pressure.
2. Scan for codes: Use an OBD-II scanner capable of reading Chassis (C) codes to confirm C1711.
3. Test for RF Interference: Unplug all aftermarket devices from power outlets (especially phone chargers and dash cams). Drive the vehicle for several minutes at speeds above 25 MPH to see if the light goes out.
4. Use a TPMS Tool: A technician will use a dedicated TPMS tool to try and activate each of the four sensors. The tool will confirm that the rear left sensor is not transmitting a signal while the others are.
5. Inspect the Sensor: If the sensor is confirmed to be dead, the tire must be dismounted for replacement. This is also an opportunity to check for physical damage.
6. Replace and Register: Install a new TPMS sensor in the rear left wheel. Using a TPMS tool, register the ID of the new sensor to the vehicle's BCM following the manufacturer's procedure.
7. Verify Repair: Clear the codes and drive the vehicle to ensure the TPMS light stays off and the system reads the pressure from all four tires.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #40700-1LA0E) — This is the sensor unit that fails, most often due to its internal battery dying after 7-10 years. It is the direct cause of the C1711 code. This part number supersedes 40700-1LA0A, 40700-1LA0B, 40700-1LA0C, and 40700-1LA0D.
  Trusted brands: Infiniti (OEM), Bosch, Schrader, VDO, Autel, Denso
  OEM price range: $80-$115
  Aftermarket price range: $40-$70

Related Codes That Often Appear With This One

• C1708 — This code is for the Front-Left wheel sensor. If seen with C1711, it could indicate multiple sensors failing around the same time due to age, or a more significant system issue like RF interference or a faulty receiver.
• C1709 — This code is for the Front-Right wheel sensor. Seeing it with C1711 suggests either multiple sensor failures or a broader system problem.
• C1710 — This code is for the Rear-Right wheel sensor. If both rear sensors fail simultaneously, it's worth investigating for RF interference or a receiver issue before replacing both sensors.

Technical Service Bulletins (TSBs) & Recalls

• ITB13039A - This bulletin provides comprehensive information on the TPMS/LTPWS system and specifically mentions radio frequency interference from devices like 'Smart cell phone chargers' as a cause for a 'No Data' condition resulting in codes C1708, C1709, C1710, and C1711. It advises removing these devices before performing further diagnostics.

Platform-Specific Known Issues

• Per TSB ITB13039A, the TPMS in these vehicles is known to be susceptible to radio frequency interference from devices like 'smart phone chargers', which can cause a 'No Data' condition and trigger codes C1708, C1709, C1710, or C1711. This should be the first diagnostic check due to it being a no-cost fix.
• The TPMS control module (receiver), while a rare failure point, is located behind the glove box on most related Nissan/Infiniti platforms, making it accessible for diagnosis if multiple sensors fail to communicate simultaneously.

Scan Tool Commands That Help

• Infiniti CONSULT-III / CONSULT-III plus: Work Support > ID REGIST — This is the primary function used after replacing a TPMS sensor to write the new, unique sensor ID into the Body Control Module (BCM). 🎬 Watch: Step-by-step guide to programming new Infiniti tire sensors. Failure to perform this step will result in the TPMS light staying on.
• Infiniti CONSULT-III / CONSULT-III plus: Data Monitor — Used to view the live data stream from the TPMS system. A technician can use this to confirm the BCM is not receiving a signal from the specific ID registered to the rear-left wheel, verifying the C1711 fault.

Wiring & Ground Locations

• Body Control Module (BCM) — Located in the passenger compartment, typically at the right end of the dashboard or in the passenger footwell area by the kick panel.. The BCM is the main computer that contains the TPMS receiver. It receives the signals from all four wheel sensors, interprets the data, and stores the C1711 trouble code if the rear-left signal is lost. All diagnostic paths lead to or from the BCM.
• TPMS Warning Check Connector (M91) — A single-wire connector, often white, found taped to the wiring harness near the OBD-II port under the driver's side dashboard.. This connector is a service port used to manually put the TPMS system into 'learning mode' without a scan tool. By grounding the pin in this connector multiple times in a specific sequence, a technician or knowledgeable owner can trigger the relearn process.
• Ground Point B7 — Located in the driver's side left kick panel.. This is a major ground point for various body electrical components. While not directly linked to C1711 in documentation, a poor or corroded ground here could potentially cause communication issues with modules located on the driver's side.

Real Owner Repair Stories

• G35Driver Forum & YouTube DIY Videos (Infiniti G35/G37 and Nissan models with similar TPMS systems) — TPMS warning light flashing after startup, indicating a system fault after swapping wheels or replacing a sensor.
  ❌ Tried (didn't work) Driving the vehicle, hoping for an automatic relearn., Taking it to a shop that did not have the correct Infiniti-compatible registration tool.
  ✅ What actually fixed it A manual, tool-free relearn procedure was performed. This involved: 1) Setting unique tire pressures (e.g., LF 34psi, RF 31psi, RR 29psi, LR 26psi). 2) Turning the ignition ON (engine off). 3) Locating the TPMS check connector near the OBD-II port and grounding its pin to the metal OBD-II bracket 5-6 times within 10 seconds until the TPMS light started flashing slowly. 4) Driving the vehicle above 25 MPH for several minutes until the light turned off, indicating the new sensor IDs were registered. 5) Re-inflating tires to the correct placard pressure.