P2135 on Jaguar: How to Diagnose & Fix
Throttle/Pedal Position Sensor Voltage Correlation
1 Jaguar model · 1 documented issue · $300-$800 repair
P2135 on Jaguar by model: symptoms, diagnosis and fix
The electronic throttle body on the XK develops position sensor failures causing erratic throttle response, limp mode, and check engine lights. The dual-track position sensor wears internally, sending conflicting signals to the engine management system.
Common Symptoms
- Erratic throttle response
- Reduced Engine Power / limp mode
- Check engine light with throttle codes
- Surging idle
- Engine stalling at low speed
How to Fix
Replace the throttle body assembly — the position sensor is not serviceable separately. Recalibrate the throttle position and idle using JLR diagnostic software after replacement. Clean the intake manifold of any carbon deposits during the service.
Owner tips & cautions
- TipKeep a spare throttle body in the trunk if you tour with your XK. It is a 20-minute roadside swap that can get you home instead of waiting for a tow.
P2135 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2135 mean on a Jaguar?
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 Jaguar it is documented across 1 model: XK.
What are the most common causes of P2135?
The most common causes of P2135 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P2135 on a Jaguar?
Published repair estimates on Jaguar range from $300 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.