Code
P0464
Generic
P — Powertrain
Fuel Level Sensor A Circuit Intermittent
Views:
UK: 28
EN: 46
RU: 30
AI status
Completed
Completed
100%
Causes
- Wiring harness damage (chafing, broken conductor, connector corrosion)
- Poor or intermittent connector contact at fuel pump/module or ECM
- Faulty fuel level sender (worn float, bent arm, dirty contacts, internal open/short)
- Intermittent short to battery or ground in the sensor circuit
- Water/fuel contamination or debris affecting the sender
- Poor ground at module/ECM or tank-mounted module
Symptoms
- Intermittent or incorrect fuel gauge reading (jumping, pegged full/empty)
- Malfunction Indicator Lamp (MIL) may be off; DTC P0464 stored in history
- No starting impact usually (fuel level sensor is typically not required for starting), but driver sees wrong fuel level
- Possible no fuel gauge operation at all when circuit open/intermittent
What to check
- Retrieve freeze frame and live data for fuel level sensor value and any related freeze-frame parameters
- Visually inspect wiring and connectors at fuel pump/sender and ECM for corrosion, damage, pin push-out or fuel intrusion
- Back-probe the sender connector and observe live voltage/resistance while moving harness and float
- Check connector pins for tightness and corrosion; unplug and inspect both sides
- Measure continuity and resistance of wiring between sender and ECM while wiggling harness to reveal intermittent opens
- Scan for other related codes (P0460–P0463) and check for ECM software updates or TSBs
Signal parameters
- Typical sender is a variable resistor; resistance usually varies with tank level (example ranges: ~10–250 Ω, vehicle-specific)
- Analog voltage to ECM often varies between ~0.1–4.9 V depending on level (or 0–5 V on some systems)
- At key ON (engine off) signal should be stable and correlate with float position
- Intermittent fault: signal may drop to 0 V, jump to battery voltage, show spikes, or flicker while back-probing or moving harness
Diagnostic algorithm
- Read and record freeze frame and live data for fuel level sensor. Note conditions when code set (key on/off, vehicle movement, fuel level).
- Perform a visual inspection of pump/module connector and wiring harness for chafing, heat damage, or corrosion. Repair any physical damage and retest.
- Back-probe the sender signal and ground. With key ON, observe voltage/ resistance and monitor while moving the harness and tapping the fuel tank module to reproduce intermittent behaviour.
- Check for proper reference supply and ground at the sender (verify ~5 V reference or vehicle-specific supply, and good ground).
- Measure sender resistance across full float travel (if accessible) and compare to expected range in service data. Look for intermittent changes or open circuit.
- If intermittent continues and wiring checks good, remove fuel pump/module (if required) to inspect sender assembly and connector. Repair or replace sender assembly if internal faults found.
- If sender and harness test good, test continuity between sender connector and ECM pin; repair any wiring faults. Replace or repair ECM only after eliminating harness and sender faults and checking for software updates/TSBs.
- Clear codes and perform a road test or recreate conditions to verify the intermittent fault does not return.
Likely causes
- Corroded or loose connector at the fuel pump/fuel level sender
- Broken or brittle wire in the harness that moves when vehicle or pump is disturbed
- Worn/dirty float contacts inside the sender assembly causing intermittent resistance changes
- Connector pin pushed out or bent on the sender or ECM connector
Fault status
Status
Intermittent fault detected on Fuel Level Sensor A circuit. Signal was unstable or interrupted but did not remain continuously faulted.
Repair difficulty: Medium
Diagnostic time: 0.8-2.5 hours
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Code
P0464
GWM
P — Powertrain
- Fuel Level Sensor Fault
Views:
UK: 13
EN: 31
RU: 14
AI status
Completed
Completed
100%
Causes
- Wiring harness damage (chafing, broken conductor, connector corrosion)
- Poor or intermittent connector contact at fuel pump/module or ECM
- Faulty fuel level sender (worn float, bent arm, dirty contacts, internal open/short)
- Intermittent short to battery or ground in the sensor circuit
- Water/fuel contamination or debris affecting the sender
- Poor ground at module/ECM or tank-mounted module
Symptoms
- Intermittent or incorrect fuel gauge reading (jumping, pegged full/empty)
- Malfunction Indicator Lamp (MIL) may be off; DTC P0464 stored in history
- No starting impact usually (fuel level sensor is typically not required for starting), but driver sees wrong fuel level
- Possible no fuel gauge operation at all when circuit open/intermittent
What to check
- Retrieve freeze frame and live data for fuel level sensor value and any related freeze-frame parameters
- Visually inspect wiring and connectors at fuel pump/sender and ECM for corrosion, damage, pin push-out or fuel intrusion
- Back-probe the sender connector and observe live voltage/resistance while moving harness and float
- Check connector pins for tightness and corrosion; unplug and inspect both sides
- Measure continuity and resistance of wiring between sender and ECM while wiggling harness to reveal intermittent opens
- Scan for other related codes (P0460–P0463) and check for ECM software updates or TSBs
Signal parameters
- Typical sender is a variable resistor; resistance usually varies with tank level (example ranges: ~10–250 Ω, vehicle-specific)
- Analog voltage to ECM often varies between ~0.1–4.9 V depending on level (or 0–5 V on some systems)
- At key ON (engine off) signal should be stable and correlate with float position
- Intermittent fault: signal may drop to 0 V, jump to battery voltage, show spikes, or flicker while back-probing or moving harness
Diagnostic algorithm
- Read and record freeze frame and live data for fuel level sensor. Note conditions when code set (key on/off, vehicle movement, fuel level).
- Perform a visual inspection of pump/module connector and wiring harness for chafing, heat damage, or corrosion. Repair any physical damage and retest.
- Back-probe the sender signal and ground. With key ON, observe voltage/ resistance and monitor while moving the harness and tapping the fuel tank module to reproduce intermittent behaviour.
- Check for proper reference supply and ground at the sender (verify ~5 V reference or vehicle-specific supply, and good ground).
- Measure sender resistance across full float travel (if accessible) and compare to expected range in service data. Look for intermittent changes or open circuit.
- If intermittent continues and wiring checks good, remove fuel pump/module (if required) to inspect sender assembly and connector. Repair or replace sender assembly if internal faults found.
- If sender and harness test good, test continuity between sender connector and ECM pin; repair any wiring faults. Replace or repair ECM only after eliminating harness and sender faults and checking for software updates/TSBs.
- Clear codes and perform a road test or recreate conditions to verify the intermittent fault does not return.
Likely causes
- Corroded or loose connector at the fuel pump/fuel level sender
- Broken or brittle wire in the harness that moves when vehicle or pump is disturbed
- Worn/dirty float contacts inside the sender assembly causing intermittent resistance changes
- Connector pin pushed out or bent on the sender or ECM connector
Fault status
Status
Intermittent fault detected on Fuel Level Sensor A circuit. Signal was unstable or interrupted but did not remain continuously faulted.
Repair difficulty: Medium
Diagnostic time: 0.8-2.5 hours
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Code
P0464
HUMMER
P — Powertrain
Fuel Level Sensor Circuit Intermittent
Views:
UK: 21
EN: 40
RU: 19
AI status
Completed
Completed
100%
Causes
- Wiring harness damage (chafing, broken conductor, connector corrosion)
- Poor or intermittent connector contact at fuel pump/module or ECM
- Faulty fuel level sender (worn float, bent arm, dirty contacts, internal open/short)
- Intermittent short to battery or ground in the sensor circuit
- Water/fuel contamination or debris affecting the sender
- Poor ground at module/ECM or tank-mounted module
Symptoms
- Intermittent or incorrect fuel gauge reading (jumping, pegged full/empty)
- Malfunction Indicator Lamp (MIL) may be off; DTC P0464 stored in history
- No starting impact usually (fuel level sensor is typically not required for starting), but driver sees wrong fuel level
- Possible no fuel gauge operation at all when circuit open/intermittent
What to check
- Retrieve freeze frame and live data for fuel level sensor value and any related freeze-frame parameters
- Visually inspect wiring and connectors at fuel pump/sender and ECM for corrosion, damage, pin push-out or fuel intrusion
- Back-probe the sender connector and observe live voltage/resistance while moving harness and float
- Check connector pins for tightness and corrosion; unplug and inspect both sides
- Measure continuity and resistance of wiring between sender and ECM while wiggling harness to reveal intermittent opens
- Scan for other related codes (P0460–P0463) and check for ECM software updates or TSBs
Signal parameters
- Typical sender is a variable resistor; resistance usually varies with tank level (example ranges: ~10–250 Ω, vehicle-specific)
- Analog voltage to ECM often varies between ~0.1–4.9 V depending on level (or 0–5 V on some systems)
- At key ON (engine off) signal should be stable and correlate with float position
- Intermittent fault: signal may drop to 0 V, jump to battery voltage, show spikes, or flicker while back-probing or moving harness
Diagnostic algorithm
- Read and record freeze frame and live data for fuel level sensor. Note conditions when code set (key on/off, vehicle movement, fuel level).
- Perform a visual inspection of pump/module connector and wiring harness for chafing, heat damage, or corrosion. Repair any physical damage and retest.
- Back-probe the sender signal and ground. With key ON, observe voltage/ resistance and monitor while moving the harness and tapping the fuel tank module to reproduce intermittent behaviour.
- Check for proper reference supply and ground at the sender (verify ~5 V reference or vehicle-specific supply, and good ground).
- Measure sender resistance across full float travel (if accessible) and compare to expected range in service data. Look for intermittent changes or open circuit.
- If intermittent continues and wiring checks good, remove fuel pump/module (if required) to inspect sender assembly and connector. Repair or replace sender assembly if internal faults found.
- If sender and harness test good, test continuity between sender connector and ECM pin; repair any wiring faults. Replace or repair ECM only after eliminating harness and sender faults and checking for software updates/TSBs.
- Clear codes and perform a road test or recreate conditions to verify the intermittent fault does not return.
Likely causes
- Corroded or loose connector at the fuel pump/fuel level sender
- Broken or brittle wire in the harness that moves when vehicle or pump is disturbed
- Worn/dirty float contacts inside the sender assembly causing intermittent resistance changes
- Connector pin pushed out or bent on the sender or ECM connector
Fault status
Status
Intermittent fault detected on Fuel Level Sensor A circuit. Signal was unstable or interrupted but did not remain continuously faulted.
Repair difficulty: Medium
Diagnostic time: 0.8-2.5 hours
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HTML ManualYour experience will help others
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Code
P0464
LAND ROVER
P — Powertrain
Fuel Level Sensor A - intermittent circuit
Views:
UK: 17
EN: 34
RU: 14
AI status
Completed
Completed
100%
Causes
- Wiring harness damage (chafing, broken conductor, connector corrosion)
- Poor or intermittent connector contact at fuel pump/module or ECM
- Faulty fuel level sender (worn float, bent arm, dirty contacts, internal open/short)
- Intermittent short to battery or ground in the sensor circuit
- Water/fuel contamination or debris affecting the sender
- Poor ground at module/ECM or tank-mounted module
Symptoms
- Intermittent or incorrect fuel gauge reading (jumping, pegged full/empty)
- Malfunction Indicator Lamp (MIL) may be off; DTC P0464 stored in history
- No starting impact usually (fuel level sensor is typically not required for starting), but driver sees wrong fuel level
- Possible no fuel gauge operation at all when circuit open/intermittent
What to check
- Retrieve freeze frame and live data for fuel level sensor value and any related freeze-frame parameters
- Visually inspect wiring and connectors at fuel pump/sender and ECM for corrosion, damage, pin push-out or fuel intrusion
- Back-probe the sender connector and observe live voltage/resistance while moving harness and float
- Check connector pins for tightness and corrosion; unplug and inspect both sides
- Measure continuity and resistance of wiring between sender and ECM while wiggling harness to reveal intermittent opens
- Scan for other related codes (P0460–P0463) and check for ECM software updates or TSBs
Signal parameters
- Typical sender is a variable resistor; resistance usually varies with tank level (example ranges: ~10–250 Ω, vehicle-specific)
- Analog voltage to ECM often varies between ~0.1–4.9 V depending on level (or 0–5 V on some systems)
- At key ON (engine off) signal should be stable and correlate with float position
- Intermittent fault: signal may drop to 0 V, jump to battery voltage, show spikes, or flicker while back-probing or moving harness
Diagnostic algorithm
- Read and record freeze frame and live data for fuel level sensor. Note conditions when code set (key on/off, vehicle movement, fuel level).
- Perform a visual inspection of pump/module connector and wiring harness for chafing, heat damage, or corrosion. Repair any physical damage and retest.
- Back-probe the sender signal and ground. With key ON, observe voltage/ resistance and monitor while moving the harness and tapping the fuel tank module to reproduce intermittent behaviour.
- Check for proper reference supply and ground at the sender (verify ~5 V reference or vehicle-specific supply, and good ground).
- Measure sender resistance across full float travel (if accessible) and compare to expected range in service data. Look for intermittent changes or open circuit.
- If intermittent continues and wiring checks good, remove fuel pump/module (if required) to inspect sender assembly and connector. Repair or replace sender assembly if internal faults found.
- If sender and harness test good, test continuity between sender connector and ECM pin; repair any wiring faults. Replace or repair ECM only after eliminating harness and sender faults and checking for software updates/TSBs.
- Clear codes and perform a road test or recreate conditions to verify the intermittent fault does not return.
Likely causes
- Corroded or loose connector at the fuel pump/fuel level sender
- Broken or brittle wire in the harness that moves when vehicle or pump is disturbed
- Worn/dirty float contacts inside the sender assembly causing intermittent resistance changes
- Connector pin pushed out or bent on the sender or ECM connector
Fault status
Status
Intermittent fault detected on Fuel Level Sensor A circuit. Signal was unstable or interrupted but did not remain continuously faulted.
Repair difficulty: Medium
Diagnostic time: 0.8-2.5 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.
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0
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