Code
P1923
LAND ROVER
P — Powertrain
Fuel additive level - circuit range / performance
Views:
UK: 0
EN: 5
RU: 0
AI status
Completed
Completed
100%
Causes
- Low or empty additive reservoir
- Faulty additive level sensor (float/resistive/PWM)
- Open, shorted or corroded wiring or connector to the sensor
- Poor ground or power supply to the sensor
- Contaminated or mechanically jammed float in the reservoir
- Faulty body control/module or ECM input circuit
Symptoms
- Malfunction Indicator Lamp (MIL) / engine warning illuminated
- Dash message indicating additive level or service additive required
- Additive dosing or regeneration strategies inhibited or altered
- Possible reduced engine performance or limp-home mode on some systems
- Stored freeze-frame data and related codes
What to check
- Read and record all stored codes and freeze-frame data with a suitable scan tool
- Check additive reservoir level and visually inspect for contamination or foreign objects
- Visually inspect sensor connector and wiring for corrosion, damage or water ingress
- Backprobe sensor connector with key ON and measure reference voltage, signal and ground
- Check for continuity and shorts to ground/power on the sensor harness
- Perform wiggle test on harness while watching live sensor data for intermittent faults
Signal parameters
- Typical sensor signal: 0–5.0 V DC (varies by design)
- Expected idle/normal range: often ~0.5–4.5 V depending on float position (consult OEM spec)
- Reference supply: usually 5 V or switched supply from control module
- Signal type: analog voltage or resistive change (some systems may use PWM/frequency)
Diagnostic algorithm
- Use a diagnostic scan tool to confirm P1923 and note freeze frame/live data. Clear codes and see if code returns. 2) Visually inspect the additive reservoir, sensor and connectors for contamination, corrosion, damage or loose fittings. Top up additive if low. 3) With key ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and measure the sensor signal while moving the float (if accessible). Compare to OEM values. 4) If signal is out of range, inspect harness for open/shorts: perform continuity checks to module and check for shorts to power or ground. Repair any wiring faults. 5) If wiring and supply are good but signal incorrect, remove sensor and bench-test per manufacturer procedure (measure resistance or output vs float position). Replace sensor if out of specification. 6) After repair, clear codes, top-up additive if required, and perform required system relearn or regeneration procedure per manufacturer. Re-scan and road test to confirm repair. 7) If code persists, consider module input circuit fault and consult manufacturer diagnostic procedures for ECM/body control testing or perform module replacement only after thorough verification.
Likely causes
- Contaminated or stuck float in additive reservoir
- Corroded or loose connector at the level sensor
- Failed level sensor element (electronic)
- Broken or shorted wiring between sensor and control module
Fault status
Status
P1923 — Fuel additive level sensor circuit range/performance. Check additive level, sensor, wiring and connectors.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
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Code
P1923
MITSUBISHI
P — Powertrain
Gearbox end stop shift drum#2
Views:
UK: 1
EN: 5
RU: 0
AI status
Completed
Completed
100%
Causes
- Low or empty additive reservoir
- Faulty additive level sensor (float/resistive/PWM)
- Open, shorted or corroded wiring or connector to the sensor
- Poor ground or power supply to the sensor
- Contaminated or mechanically jammed float in the reservoir
- Faulty body control/module or ECM input circuit
Symptoms
- Malfunction Indicator Lamp (MIL) / engine warning illuminated
- Dash message indicating additive level or service additive required
- Additive dosing or regeneration strategies inhibited or altered
- Possible reduced engine performance or limp-home mode on some systems
- Stored freeze-frame data and related codes
What to check
- Read and record all stored codes and freeze-frame data with a suitable scan tool
- Check additive reservoir level and visually inspect for contamination or foreign objects
- Visually inspect sensor connector and wiring for corrosion, damage or water ingress
- Backprobe sensor connector with key ON and measure reference voltage, signal and ground
- Check for continuity and shorts to ground/power on the sensor harness
- Perform wiggle test on harness while watching live sensor data for intermittent faults
Signal parameters
- Typical sensor signal: 0–5.0 V DC (varies by design)
- Expected idle/normal range: often ~0.5–4.5 V depending on float position (consult OEM spec)
- Reference supply: usually 5 V or switched supply from control module
- Signal type: analog voltage or resistive change (some systems may use PWM/frequency)
Diagnostic algorithm
- Use a diagnostic scan tool to confirm P1923 and note freeze frame/live data. Clear codes and see if code returns. 2) Visually inspect the additive reservoir, sensor and connectors for contamination, corrosion, damage or loose fittings. Top up additive if low. 3) With key ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and measure the sensor signal while moving the float (if accessible). Compare to OEM values. 4) If signal is out of range, inspect harness for open/shorts: perform continuity checks to module and check for shorts to power or ground. Repair any wiring faults. 5) If wiring and supply are good but signal incorrect, remove sensor and bench-test per manufacturer procedure (measure resistance or output vs float position). Replace sensor if out of specification. 6) After repair, clear codes, top-up additive if required, and perform required system relearn or regeneration procedure per manufacturer. Re-scan and road test to confirm repair. 7) If code persists, consider module input circuit fault and consult manufacturer diagnostic procedures for ECM/body control testing or perform module replacement only after thorough verification.
Likely causes
- Contaminated or stuck float in additive reservoir
- Corroded or loose connector at the level sensor
- Failed level sensor element (electronic)
- Broken or shorted wiring between sensor and control module
Fault status
Status
P1923 — Fuel additive level sensor circuit range/performance. Check additive level, sensor, wiring and connectors.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
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Code
P1923
SAAB
P — Powertrain
No Bus Data From TCM
Views:
UK: 1
EN: 1
RU: 2
AI status
Completed
Completed
100%
Causes
- Low or empty additive reservoir
- Faulty additive level sensor (float/resistive/PWM)
- Open, shorted or corroded wiring or connector to the sensor
- Poor ground or power supply to the sensor
- Contaminated or mechanically jammed float in the reservoir
- Faulty body control/module or ECM input circuit
Symptoms
- Malfunction Indicator Lamp (MIL) / engine warning illuminated
- Dash message indicating additive level or service additive required
- Additive dosing or regeneration strategies inhibited or altered
- Possible reduced engine performance or limp-home mode on some systems
- Stored freeze-frame data and related codes
What to check
- Read and record all stored codes and freeze-frame data with a suitable scan tool
- Check additive reservoir level and visually inspect for contamination or foreign objects
- Visually inspect sensor connector and wiring for corrosion, damage or water ingress
- Backprobe sensor connector with key ON and measure reference voltage, signal and ground
- Check for continuity and shorts to ground/power on the sensor harness
- Perform wiggle test on harness while watching live sensor data for intermittent faults
Signal parameters
- Typical sensor signal: 0–5.0 V DC (varies by design)
- Expected idle/normal range: often ~0.5–4.5 V depending on float position (consult OEM spec)
- Reference supply: usually 5 V or switched supply from control module
- Signal type: analog voltage or resistive change (some systems may use PWM/frequency)
Diagnostic algorithm
- Use a diagnostic scan tool to confirm P1923 and note freeze frame/live data. Clear codes and see if code returns. 2) Visually inspect the additive reservoir, sensor and connectors for contamination, corrosion, damage or loose fittings. Top up additive if low. 3) With key ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and measure the sensor signal while moving the float (if accessible). Compare to OEM values. 4) If signal is out of range, inspect harness for open/shorts: perform continuity checks to module and check for shorts to power or ground. Repair any wiring faults. 5) If wiring and supply are good but signal incorrect, remove sensor and bench-test per manufacturer procedure (measure resistance or output vs float position). Replace sensor if out of specification. 6) After repair, clear codes, top-up additive if required, and perform required system relearn or regeneration procedure per manufacturer. Re-scan and road test to confirm repair. 7) If code persists, consider module input circuit fault and consult manufacturer diagnostic procedures for ECM/body control testing or perform module replacement only after thorough verification.
Likely causes
- Contaminated or stuck float in additive reservoir
- Corroded or loose connector at the level sensor
- Failed level sensor element (electronic)
- Broken or shorted wiring between sensor and control module
Fault status
Status
P1923 — Fuel additive level sensor circuit range/performance. Check additive level, sensor, wiring and connectors.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email