P2135 on Ford
Throttle/Pedal Position Sensor Voltage Correlation
P2135 on Ford vehicles indicates throttle/pedal position sensor voltage correlation. Au7o has documented this code across 7 Ford models — most commonly on Edge, Explorer, F-150. P2135 means the powertrain computer detected that the two throttle position (TP) or accelerator pedal position sensors disagree with each other. Drive-by-wire systems use redundant sensors so the PCM can cross-check the throttle or pedal reading for safety; if the two signals don't correlate within an expected range, this code sets. As a fail-safe, the vehicle often enters a reduced-power 'limp' mode, causing sluggish acceleration, a stuck or hesitant throttle, and a warning light. Because it affects throttle control, it should be addressed promptly. Typical repair costs on Ford range from $150 to $900, depending on the specific model and root cause.
Common Causes of P2135
- •Faulty throttle position sensor / throttle body assembly
- •Faulty accelerator pedal position sensor
- •Damaged wiring or connectors at the throttle body or pedal
- •Corroded or loose connector terminals
- •Poor ground or reference voltage problem
- •Carbon buildup binding the electronic throttle plate
- •Failed PCM (rare)
P2135 on Ford by Model
Ford Edge(1 issue)
- Electronic Throttle Body Contact Degradation - Sudden Limp Mode and Wrench Light2007-2014
The CD3 Edge uses a Ford electronic throttle body (ETB) with an integrated throttle position sensor. Non-conductive deposits build up on the internal sensor contacts, so the PCM sees an implausible or drifting throttle plate position and drops the vehicle into failsafe/limp mode - the amber wrench warning lights up and engine output is cut to idle-ish power, often at highway speed with no warning. Owners describe it as the truck 'just quitting on me' merging or passing, sometimes clearing after a key cycle and then recurring more frequently. Cleaning the throttle bore does not fix it because the fault is on the electronic contacts inside the sealed unit, not carbon on the plate. Ford acknowledged the family-wide ETB problem with extended coverage programs on several models, and the failure is heavily represented in NHTSA complaints for the Edge.
Ford Explorer(1 issue)
- Throttle Body Failure on 4.6L V8 Causing Wrench Light, Limp Mode, and Sudden Loss of Power2006-2010
Later 4th-generation Explorers with the 4.6L 3-valve V8 commonly suffer electronic throttle body problems. Owners report the wrench light illuminating, the vehicle abruptly entering fail-safe mode, and the engine losing throttle response or dropping to idle while driving. This issue is well documented across Ford products using similar electronic throttle bodies and is frequently associated with internal motor or throttle position sensor faults.
Ford F-150(1 issue)
- Throttle Body / Electronic Throttle Stalling and Hesitation2004
Multiple complaints describe the truck stalling in traffic, hesitating on throttle input, or losing power while slowing, idling, reversing, or attempting to accelerate. Several reports specifically mention the throttle body as the cause, with symptoms consistent with electronic throttle control faults or severe throttle body contamination/failure.
Ford Fiesta(1 issue)
- Electronic Throttle Body Failure — Sudden Limp Mode & Wrench Light2011-2019
The drive-by-wire electronic throttle body (ETB) develops an internal electronic/motor fault (not just dirt) that causes the powertrain control module to command reduced power. The car drops into limp mode with a wrench/powertrain-malfunction light, often storing throttle-position or actuator-control codes. Because the failure is internal to the unit, cleaning does not fix it. This is a recognized Ford-family ETB problem shared with Focus, Escape, Fusion and Transit Connect, and is reported by Fiesta owners including on the 1.6L engines.
Ford Flex(1 issue)
- Electronic Throttle Body Failure Causes Limp Mode (P2111/P2112/P2119)2009-2016
The electronic throttle body on the 3.5L/3.7L Cyclone V6 uses a plastic-geared motor and integrated throttle position sensors. Contamination, gear wear and sensor drift cause the PCM to lose confidence in commanded vs. actual plate position, triggering failsafe cooling mode. The vehicle drops to a fixed low-power limp mode with the wrench light on, often at highway speed, which is why owners describe it as a safety issue rather than a driveability annoyance. Ford acknowledged the pattern with customer satisfaction/warranty extension programs (13N03, 16B32) and a TSB covering 2015-2016 3.5L vehicles built on or before 31 May 2016. The failure is frequently intermittent at first: the wrench light appears, the vehicle is restarted, and normal power returns until the next episode.
Ford Fusion(1 issue)
- Electronic Throttle Body Failure - Limp Mode and Wrench Light2010-2016
The electronic throttle body suffers internal contamination/wear of the motor contacts, causing intermittent electrical failure rather than simple dirt buildup. The result is a sudden loss of power (limp/failsafe mode) with the amber wrench (powertrain) warning light, rough idle, or stalling, sometimes in traffic. Ford acknowledged the problem with extended-warranty program 13N03 for 2010-2013 models and Customer Satisfaction Program 16B32 for certain 2015-2016 vehicles including Fusion.
Ford Transit(1 issue)
- 3.7L Ti-VCT Throttle Body Failure / Electronic Throttle Control (ETC) Limp Mode2015-2019
Owners report sudden loss of power with a wrench light and reduced throttle response, often while cruising or accelerating. NHTSA complaints and Ford service information describe electronic throttle body internal faults (TPS/actuator) that can trigger ETC failsafe and limp mode on 3.7L Ti-VCT Transits. The condition may be intermittent at first and then become frequent, especially with heat/soak and higher mileage.
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View P2135 across all makes →Frequently Asked Questions
What does P2135 mean on Ford?▼
P2135 stands for "Throttle/Pedal Position Sensor Voltage Correlation." P2135 means the powertrain computer detected that the two throttle position (TP) or accelerator pedal position sensors disagree with each other. Drive-by-wire systems use redundant sensors so the PCM can cross-check the throttle or pedal reading for safety; if the two signals don't correlate within an expected range, this code sets. As a fail-safe, the vehicle often enters a reduced-power 'limp' mode, causing sluggish acceleration, a stuck or hesitant throttle, and a warning light. Because it affects throttle control, it should be addressed promptly. On Ford specifically, this code is documented across 7 models.
What causes P2135 on Ford vehicles?▼
Common causes on Ford: Faulty throttle position sensor / throttle body assembly, Faulty accelerator pedal position sensor, Damaged wiring or connectors at the throttle body or pedal, Corroded or loose connector terminals, Poor ground or reference voltage problem. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2135 on a Ford?▼
Repair costs on Ford range from $150 to $900, depending on the specific model and root cause.
Which Ford models have P2135 documented?▼
Au7o has documented P2135 on 7 Ford models: Edge, Explorer, F-150, Fiesta, Flex, Fusion, Transit.