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2017 Range Rover Evoque SE - Random Limp Mode and Engine Light P2135

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Mike T. · rep 0 · May 25, 4:41 AM · 1 replies · solved · Question

Vehicle: 2017 Land Rover Range Rover Evoque SE

My 2017 Range Rover Evoque SE has been randomly going into limp mode. The check engine light comes on, and when I scanned it, I got a P2135 code, which points to a "Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation" issue.

It usually clears after I restart the car, but it's happening more frequently now, sometimes even multiple times a day. Is this just a faulty sensor that I can replace myself, or could it be a wiring problem or something more serious with the throttle body itself?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:41 AM

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ClearTheCode admin answer: The P2135 code on your 2017 Range Rover Evoque SE, combined with random limp mode, strongly suggests an issue within the electronic throttle control (ETC) system. This system is critical for engine operation and safety.

Here's a breakdown of potential causes and diagnostic steps:

  1. Throttle Body Assembly: The throttle body contains the throttle position sensors (TPS) and the motor that controls the throttle plate. Carbon buildup can sometimes interfere with its operation, but often, the sensors themselves fail internally. A faulty TPS will send incorrect voltage signals to the PCM.
  2. Accelerator Pedal Position (APP) Sensor: The APP sensor, located on the accelerator pedal, tells the PCM how much throttle input you're requesting. If there's a correlation issue between the APP sensor and the TPS, this code can set.
  3. Wiring and Connectors: Inspect the wiring harness and connectors for both the throttle body and the accelerator pedal. Look for any signs of fraying, corrosion, or loose connections. A poor connection can cause intermittent signal loss.
  4. Powertrain Control Module (PCM): While less common, a faulty PCM could misinterpret sensor signals or have internal issues. This is usually a last resort diagnosis.

When to see a shop:

  • If cleaning the throttle body (if applicable and accessible) doesn't resolve the issue, or if you're uncomfortable performing this task.
  • For proper diagnosis of the APP sensor or TPS, as specific diagnostic tools are often needed to monitor live data streams and pinpoint the exact component failing.
  • If the issue persists after sensor replacement, as it might indicate a deeper wiring problem or a PCM fault, which requires advanced electrical diagnostics.
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