Code
P1215
LAND ROVER
P — Powertrain
Pedal position sensor C low input
Views:
UK: 6
EN: 18
RU: 6
AI status
Completed
Completed
100%
Causes
- Damaged or shorted pedal position sensor (APPS) channel C
- Open or short to ground in the signal wire for sensor C
- Corroded, loose or damaged connector/pins at the pedal or ECM
- Low or missing sensor reference voltage or poor ground
- Water intrusion or connector contamination
- Faulty ECM (rare) or internal driver failure
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
- Reduced engine power or 'limp' mode
- Poor or hesitant acceleration; pedal response abnormal
- Stored code(s) related to pedal/throttle position
- Inconsistent or no change in signal when pedal is moved
What to check
- Read freeze frame and live data with a capable scan tool; note pedal sensor C voltage while operating pedal
- Visually inspect pedal connector, harness routing, and ECM connector for damage or corrosion
- Backprobe pedal connector and check for proper 5 V reference and ground
- Measure signal voltage at pedal (and at ECM connector) while slowly moving the pedal
- Compare sensor C reading to other pedal channels (A/B) if present
- Wiggle harness and connectors while observing live data for intermittent faults
Signal parameters
- Reference (Vref) usually ≈ 5.0 V (acceptable ~4.75–5.25 V)
- Ground continuity to chassis ground ≈ 0 Ω–
- Pedal position sensor C nominal output: 0.5–4.5 V across pedal travel (varies by design)
- Low input fault threshold: signal typically < ~0.2–0.5 V or not changing with pedal movement
- Signal should change smoothly and proportionally as pedal is moved; no abrupt drops to near 0 V
Diagnostic algorithm
- Connect a scan tool; record freeze frame, pending/confirmed codes, and live data for pedal channels.
- Clear codes and attempt to reproduce; note conditions when P1215 sets.
- Visually inspect pedal harness, connector and routing for chafing, pin damage, or corrosion.
- Backprobe sensor connector: verify Vref ~5 V with ignition ON, verify good ground.
- With backprobe or multimeter, measure sensor C signal while slowly moving pedal; verify voltage ramp and that it is not stuck low.
- If signal is low at pedal connector, replace pedal sensor assembly (or repair connector) and retest.
- If signal is correct at pedal but low at ECM, inspect/repair wiring between pedal and ECM; check continuity and for shorts to ground.
- If wiring and sensor check good but code persists, inspect ECM connector and grounds; consider ECM bench or module testing as last resort.
- After repairs, clear codes and verify proper operation and that code does not return under same conditions.
Likely causes
- Poor connector contact or corrosion at pedal harness
- Broken/shorted signal wire for sensor C
- Failed pedal position sensor (channel C element)
- Loss of 5 V reference or ground to the pedal sensor
- Intermittent harness damage (pinched/worn) near pedal or firewall
Fault status
Status
MIL ON — Pedal Position Sensor C Low Input. ECM has detected a low or inactive signal from the pedal sensor C circuit; vehicle may enter reduced power mode until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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