P0182

Code

LAND ROVER P — Powertrain

Fuel temperature sensor A low input circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 37 EN: 37 RU: 39

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Page language: EN

Causes

Short to ground on the fuel temperature sensor signal circuit
Open or damaged sensor wiring or connector (corrosion, broken wire, poor pin contact)
Failed fuel temperature sensor (thermistor)
Poor or missing sensor ground or reference circuit issue
Faulty ECM (rare)
Water or fuel contamination in connector or sensor

Symptoms

Check Engine Light (MIL) illuminated
Stored/active P0182 code (fuel temperature sensor A low input)
Fuel temperature reading in scan tool appears much lower than ambient or pegged at a low value
Possible hard cold start or incorrect fuel trim behavior
Reduced fuel economy or driveability complaints (if ECM uses fuel temp for fueling)

What to check

Retrieve freeze frame and full DTC history with a scan tool
Verify the fuel temperature reading on live data and compare with ambient temperature
Visually inspect sensor connector and wiring for damage, corrosion, or pins pushed out
Check for other related codes (fuel pressure, coolant temp, intake air temp)
Confirm battery voltage and vehicle ground integrity before electrical tests
If available, compare sensor reading with an independent thermometer at the fuel inlet or tank (where sensor is located)

Signal parameters

Sensor type: thermistor (temperature-dependent resistance) feeding the ECM analog input
Expected signal: typical ECU analog range ~0.1–4.9 V (varies by vehicle); low-input fault means the voltage is unexpectedly low or at/near 0 V
Resistance varies with temperature (NTC: resistance decreases as temperature rises) — check Land Rover factory specifications for exact ohms-vs-temperature curve
ECM reference/pull-up voltage present on circuit — measure against spec

Diagnostic algorithm

Verify the code and note freeze frame data with a scan tool
Record fuel temperature PID at key conditions (ambient cold start, warm engine) and compare to expected ambient temperature
Perform a careful visual inspection of the sensor, connector, and wiring from sensor to ECM; repair any chafing, corrosion, or pin damage
With ignition ON (engine off) backprobe the signal wire and measure voltage at the sensor connector — confirm presence of the ECM pull-up/reference voltage and whether signal is low/0 V
Check sensor ground continuity to chassis ground and to ECM ground; repair any high-resistance grounds
Unplug the sensor and check signal line voltage at the harness connector (if unplugging changes voltage, suspect sensor or short to ground)
Measure sensor resistance (at ambient) and compare to factory specification or a known-good sensor; if reading out of spec, replace sensor
Perform a wiggle test on harness while monitoring live data for intermittent faults
If wiring appears open/short-free and sensor reads in-spec, consider ECM input fault — consult wiring diagrams and test ECM pins for proper voltages/grounds
After repairs, clear codes and road test while monitoring fuel temperature PID to confirm fault does not return

Likely causes

Damaged/shorted signal wire to ground
Corroded/loose connector at the sensor
Failed fuel temperature sensor element
Poor ground or connector contamination

Fault status

⚠️ Status

P0182 — Fuel Temperature Sensor A: Low input detected (signal voltage below expected range). Common causes include short to ground in signal circuit, faulty sensor, or poor connector/ground. Verify wiring and sensor before replacing ECM.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P0182 — Fuel temperature sensor A low input circuit