P0226

Code

LAND ROVER P — Powertrain

Throttle Pedal Position Sensor C Circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 30 EN: 68 RU: 33

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Page language: EN

Causes

Open or shorted wiring in the pedal sensor 'C' signal circuit
Corroded, loose, or damaged connector at the pedal sensor or ECM
Faulty throttle/pedal position sensor (internal electronics failure)
Poor sensor ground or reference voltage (5 V) fault
Water intrusion or contamination of the connector
Intermittent connector contact due to vibration

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Limited engine power or limp-home mode engaged
Poor or unresponsive throttle response
Hesitation or surging during acceleration
Possible hard starting if multiple pedal circuits are affected

What to check

Read and record freeze-frame and live data for pedal position sensors A/B/C and throttle position
Visually inspect pedal sensor connector, pins and wiring for corrosion, damage or moisture
Backprobe sensor connector and verify reference voltage (typically ~5 V) with key ON, engine OFF
Verify sensor ground continuity to chassis ground
Measure the 'C' signal voltage at rest and while moving the pedal — it should vary smoothly with pedal travel
Check for diagnostic trouble codes related to other pedal/throttle circuits (P0220–P0230 range, P2138/P2135)

Signal parameters

Reference (supply) voltage: nominally ~5 V (verify vehicle-specific spec)
Sensor signal 'C' voltage at rest: typically low (approx. 0.5–1.5 V) and increases with pedal travel
Sensor signal 'C' voltage at full pedal: typically high (approx. 3.5–4.5 V)
Signal should change smoothly and proportionally as pedal moves; no sudden jumps, drops to 0 V, or hard shorts to 5 V
Sensor ground continuity: near 0 ohms to chassis ground

Diagnostic algorithm

Connect a scan tool, record stored codes, freeze-frame data and live pedal/throttle signals (A/B/C). Note if multiple pedal circuits are failed or out of correlation.
Perform a visual inspection of the pedal sensor harness and connector for corrosion, bent pins, water ingress or physical damage.
With key ON (engine OFF), backprobe the sensor connector: verify reference voltage (~5 V), sensor ground continuity and signal 'C' voltage at rest.
Slowly depress the pedal while watching the signal 'C' voltage: it should rise smoothly. If it is stuck, jumps, or reads 0 V/5 V, suspect wiring or sensor.
If reference or ground is missing or abnormal, trace and repair the wiring to the ECU ground/reference source before replacing the sensor.
Check continuity and resistance of the signal conductor between the pedal connector and the ECM connector. Repair any opens/shorts. Perform wiggle test for intermittent faults.
If wiring and connectors are good, replace the throttle pedal position sensor assembly. Clear codes and retest for proper operation.
If fault persists after sensor replacement and wiring verified, suspect ECM input fault; confirm with ECU bench tests or dealer-level diagnostics before ECU replacement.
After repairs, erase codes, perform a functional test and road test to confirm no recurrence.

Likely causes

Corroded/damaged connector at the throttle pedal position sensor
Broken/chafed signal wire between pedal sensor and ECM
Failed throttle pedal position sensor assembly
Poor sensor reference (5 V) or ground connection

Fault status

⚠️ Status

Throttle Pedal Position Sensor 'C' Circuit fault detected — electrical problem (open/short/implausible signal) in the pedal sensor 'C' circuit. MIL on; vehicle may enter reduced-power (limp) mode until fault is resolved.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

Repair manuals

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P0226 — Throttle Pedal Position Sensor C Circuit