P1702 on Citroen
Transmission Range Sensor Circuit Intermittent (Ford)
P1702 on Citroen vehicles indicates transmission range sensor circuit intermittent (ford). Au7o has documented this code across 1 Citroen model — most commonly on C3. P1702 is a manufacturer-specific code. On Ford, Lincoln, and Mazda vehicles (the dominant usage, shared by Citroën/Peugeot), it means the computer is intermittently losing or receiving an implausible signal from the transmission range (TR) sensor — the switch that tells the PCM/TCM whether you have selected Park, Reverse, Neutral, or Drive. When the signal drops out you may see a blank or wrong PRNDL display, harsh or erratic shifting, no reverse lights, or an engine that won't crank in Park; on 2011-2017 Ford trucks with the 6R80 transmission the sensor is part of an internal "lead frame" harness with a well-documented failure pattern (often with P0705, P0706, or P1921). Ignoring it risks being stranded with a no-start or the transmission engaging a gear the computer didn't expect. Note that the definition differs on other brands: on VW/Audi (VAG code 18110) P1702 instead means the transmission control module could not activate its fail-safe (limp-home) function because another equal-priority fault is stored, and on Nissan/Infiniti it indicates a TCM RAM error — so verify the meaning for your specific make. Typical repair costs on Citroen range from $600 to $3,000, depending on the specific model and root cause.
Common Causes of P1702
- •Failed or worn transmission range (TR) sensor — on 2011-2017 Ford 6R80 trucks/SUVs this is the molded lead frame inside the transmission, a known failure point
- •Corroded or moisture-contaminated TR sensor connector pins causing intermittent signal dropouts
- •Damaged, chafed, or loose wiring in the TR sensor circuit
- •Misadjusted shift cable/linkage or TR sensor alignment
- •On VW/Audi: a second stored transmission fault of equal priority blocking the TCM's fail-safe function (often points to a deeper TCM or transmission fault)
- •Low or contaminated transmission fluid degrading the internal lead-frame sensor
- •Faulty PCM/TCM (rare)
P1702 on Citroen by Model
Citroen C3(1 issue)
- SensoDrive/EGS/ETG Automated-Manual Gearbox and Clutch Actuator Failure2003-2016
C3s fitted with Citroen's automated-manual gearboxes — SensoDrive on the C3 I, then EGS6/ETG6 on later e-HDi and PureTech cars — suffer well-documented failures of the electronic clutch actuator, gear actuator and gearbox ECU. Worn actuator motors and clutch-position adaptation errors cause violently jerky gearchanges, refusal to select gears, gearbox warning messages with the box locked in gear (limp mode), and in some ECU failures a car that will not start. Specialist rebuilders describe the actuator and ECU faults as inherent design weaknesses, and repairs at a dealer can run from several hundred to several thousand pounds.
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View P1702 across all makes →Frequently Asked Questions
What does P1702 mean on Citroen?▼
P1702 stands for "Transmission Range Sensor Circuit Intermittent (Ford)." P1702 is a manufacturer-specific code. On Ford, Lincoln, and Mazda vehicles (the dominant usage, shared by Citroën/Peugeot), it means the computer is intermittently losing or receiving an implausible signal from the transmission range (TR) sensor — the switch that tells the PCM/TCM whether you have selected Park, Reverse, Neutral, or Drive. When the signal drops out you may see a blank or wrong PRNDL display, harsh or erratic shifting, no reverse lights, or an engine that won't crank in Park; on 2011-2017 Ford trucks with the 6R80 transmission the sensor is part of an internal "lead frame" harness with a well-documented failure pattern (often with P0705, P0706, or P1921). Ignoring it risks being stranded with a no-start or the transmission engaging a gear the computer didn't expect. Note that the definition differs on other brands: on VW/Audi (VAG code 18110) P1702 instead means the transmission control module could not activate its fail-safe (limp-home) function because another equal-priority fault is stored, and on Nissan/Infiniti it indicates a TCM RAM error — so verify the meaning for your specific make. On Citroen specifically, this code is documented across 1 model.
What causes P1702 on Citroen vehicles?▼
Common causes on Citroen: Failed or worn transmission range (TR) sensor — on 2011-2017 Ford 6R80 trucks/SUVs this is the molded lead frame inside the transmission, a known failure point, Corroded or moisture-contaminated TR sensor connector pins causing intermittent signal dropouts, Damaged, chafed, or loose wiring in the TR sensor circuit, Misadjusted shift cable/linkage or TR sensor alignment, On VW/Audi: a second stored transmission fault of equal priority blocking the TCM's fail-safe function (often points to a deeper TCM or transmission fault). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1702 on a Citroen?▼
Repair costs on Citroen range from $600 to $3,000, depending on the specific model and root cause.
Which Citroen models have P1702 documented?▼
Au7o has documented P1702 on 1 Citroen model: C3.