P1702 on 2003-2016 Citroen C3 — Transmission Range Sensor Circuit Intermittent (Ford)
1 vehicles · 1 makes · $600-$3,000 repair
Most Reported On
P1702 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2003-2016 Citroen C3, with repair costs ranging from $600 to $3,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1702, you'll need an OBD-II scanner. Here are our recommendations at every price point.
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FAQ
What does P1702 mean?
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.
What are the most common causes of P1702?
The most common causes of P1702 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P1702?
Repair costs for P1702 range from $600 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P1702?
Au7o has documented P1702 across 1 vehicle models from 1 manufacturers: Citroen.
Sources (7)
- articleSinspeed — Citroen/Peugeot SensoDrive Clutch & Gear Actuator Repairs
- ForumFrench Car Forum — SensoDrive gearbox troubleshooting (clutch + actuator most frequent failure)
- ForumFrench Car Forum — Citroen C3 SensoDrive issue (P1755 clutch actuator coherence fault, no-start)
- articleFixMyCar — Citroen C3 Problems: SensoDrive semi-auto is the main trouble spot (2002-2009)
- articleECU Testing — Citroen C2/C3 SensoDrive Gearbox ECU common fault (2003-2011)
- articleThe Vehicle Check — Citroen SensoDrive Clutch Actuator Fault and Repair (C2/C3 1.1/1.4/1.6)
- articleASR Gearbox Repairs — Citroen C3 Common Gearbox Problems (ETG locked in gear, harsh shifts)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.