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Home / DTC / P00D1 — Heated Oxygen Sensor Heater Control Circuit (Bank 1, sensor 1) - Range / performance

P00D1 — Heated Oxygen Sensor Heater Control Circuit (Bank 1, sensor 1) - Range / performance

Detailed page for trouble code P00D1.

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Code

P00D1

LAND ROVER P — Powertrain

Heated Oxygen Sensor Heater Control Circuit (Bank 1, sensor 1) - Range / performance

Brand: LAND ROVER
Type: P — Powertrain
AI status
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Page language: EN

Causes

  • Open or short in the heater power or ground circuit
  • Blown heater fuse or faulty heater relay
  • Failed oxygen sensor heater element
  • Corroded/loose connector or wiring damage
  • High resistance in circuit (intermittent connection)
  • PCM driver or software fault

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Longer warm-up time for closed-loop operation
  • Poor idle or rough running until engine reaches temperature
  • Reduced fuel economy and possible increased emissions
  • Stored or pending diagnostic trouble codes related to oxygen sensors/heater

What to check

  • Read and record freeze frame and pending codes with a scan tool
  • Inspect sensor connector and wiring for corrosion, heat damage, or pinched wires
  • Verify presence and condition of heater fuse and any related relays
  • Backprobe heater power and ground with scan tool while commanding heater on
  • Measure resistance of the sensor heater with the sensor disconnected
  • Check continuity between sensor heater pins and PCM connector

Signal parameters

  • Heater resistance (typical): around 2–20 ohms (manufacturer-specific)
  • Heater supply voltage when commanded ON: near battery voltage (B+), typically ~11–14 V
  • Heater current draw: generally several hundred milliamps up to a few amps depending on sensor
  • Open-circuit: infinite resistance / no continuity across heater pins
  • Short to ground: near 0 ohms between heater feed and ground
  • PCM output may be PWM duty-cycle control rather than a steady feed (varies by model)

Diagnostic algorithm

  1. Connect a professional scan tool, verify P00D1 and related codes, record freeze-frame and live data while warm/cold.
  2. Visually inspect the Bank 1 Sensor 1 connector and harness for damage, corrosion, melted insulation, or contortion points; repair as needed.
  3. Check fuses and any heater relays in the fuse/relay box; replace if blown or faulty.
  4. With the sensor connected, command the heater ON using the scan tool and measure voltage at the heater supply pin relative to ground. Expect B+ when commanded on; no voltage indicates open circuit upstream or PCM control/device issue.
  5. Disconnect the sensor and measure heater element resistance across the heater pins. Compare to specification; an open or very high resistance indicates a failed heater element.
  6. Perform continuity checks from the sensor heater pins to the PCM connector. Check for shorts to B+ or ground and for high resistance/ intermittent connection.
  7. Wiggle test the harness while monitoring heater circuit voltage/resistance to detect intermittent faults.
  8. If wiring, connector, fuses and relays are good but heater element is out of spec, replace the oxygen sensor (Bank 1, Sensor 1).
  9. If a replacement sensor does not clear the code and wiring/connector are verified, test/replace the PCM or repair PCM harness as a last step following manufacturer procedures.

Likely causes

  • Damaged/contaminated connector at Bank 1 Sensor 1
  • Heater element inside the sensor is open or has high resistance
  • Blown inline fuse or defective relay controlling the heater
  • Short to battery (B+) or to ground in the heater harness
  • Broken or pinched wiring between sensor and PCM

Fault status

⚠️ Status
Heated oxygen sensor (Bank 1, Sensor 1) heater control circuit performance out of range — controller detected abnormal heater voltage/current or resistance.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0030 P0031 P0032 P0036 P0135 P00D0
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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