Code
P0184
Generic
P — Powertrain
Fuel Temperature Sensor A Circuit Intermittent
Views:
UK: 17
EN: 23
RU: 26
AI status
Completed
Completed
100%
Causes
- Corroded, loose, or contaminated sensor connector
- Chafed or broken wiring harness to the fuel temperature sensor (intermittent contact)
- Internal intermittent fault in the fuel temperature sensor (NTC element)
- Poor ground or high-resistance connections in the sensor circuit
- Short to battery voltage or ground (intermittent)
- Aftermarket fuel system modification or sensor installed incorrectly
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated intermittently or steady
- Erratic or fluctuating fuel temperature PID readings on a scan tool
- Occasional drivability symptoms (hesitation, rough idle) if ECU fuel calculations are affected
- Reduced fuel economy or higher emissions in some conditions
- Often no noticeable symptom aside from the DTC
What to check
- Read freeze frame and live data with a scan tool; note conditions when the code set
- Visually inspect sensor connector and wiring for corrosion, damage, pin push-out or contamination
- Wiggle wiring harness and connectors while monitoring fuel temperature PID to reproduce intermittent behavior
- Check for other related DTCs (coolant temp, fuel rail pressure sensors)
- Measure sensor connector voltage and ground with backprobe while key on/engine running
- Measure sensor resistance at sensor with connector disconnected across temperatures (cold and warm)
Signal parameters
- Typical circuit: 0–5.0 V signal to PCM (varies by manufacturer)
- Most fuel temp sensors are NTC thermistors: resistance decreases as temperature rises
- Approximate example (varies by sensor): ~2–5 kΩ at ~20°C (68°F), a few hundred ohms at high temperature (~80–90°C). Use vehicle-specific specs when available
- PCM expects a smooth, monotonic change in voltage/resistance as fuel temperature changes; rapid jumps or open/short conditions indicate a fault
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data with a scan tool. Note engine/fuel temps and operating conditions when code occurred.
- Visually inspect the fuel temperature sensor connector, pins and wiring for corrosion, looseness, damage, rodent chew or pinback. Repair as needed.
- With ignition ON (engine off) and using a multimeter/scan tool, backprobe sensor signal and ground. Verify reference voltage and ground integrity.
- Monitor live fuel temperature PID while performing a wiggle test of the harness and connector to try to reproduce the intermittent. If data jumps or code returns, suspect wiring/connector.
- With connector disconnected, measure sensor resistance at ambient and after warming (by running engine briefly or gently warming sensor). Compare to manufacturer spec. Replace sensor if resistance is erratic or out of spec.
- Check for intermittent short to battery or ground using a lab scope or backprobing while inducing movement. Repair short/chafing and retest.
- Repair or replace damaged wiring, terminals or sensor. Clear codes and road test to confirm the DTC does not return under the previously recorded conditions.
- If wiring and sensor check good and the fault persists, inspect PCM input circuits and grounds; consider OEM wiring diagrams and PCM bench testing as a last resort.
Likely causes
- Loose or corroded connector at the sensor
- Chafed wiring that makes intermittent contact when the engine vibrates
- Sensor internal intermittent (open/short under certain temperatures)
- High-resistance ground or poor mating terminals
- Intermittent short to power or ground in harness
Fault status
Status
P0184 — Fuel Temperature Sensor A Circuit Intermittent. Intermittent/unstable signal detected from the fuel temperature sensor; inspect sensor, wiring, connector and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0184
GWM
P — Powertrain
- Fuel temperature sensor A fault
Views:
UK: 1
EN: 2
RU: 4
AI status
Completed
Completed
100%
Causes
- Corroded, loose, or contaminated sensor connector
- Chafed or broken wiring harness to the fuel temperature sensor (intermittent contact)
- Internal intermittent fault in the fuel temperature sensor (NTC element)
- Poor ground or high-resistance connections in the sensor circuit
- Short to battery voltage or ground (intermittent)
- Aftermarket fuel system modification or sensor installed incorrectly
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated intermittently or steady
- Erratic or fluctuating fuel temperature PID readings on a scan tool
- Occasional drivability symptoms (hesitation, rough idle) if ECU fuel calculations are affected
- Reduced fuel economy or higher emissions in some conditions
- Often no noticeable symptom aside from the DTC
What to check
- Read freeze frame and live data with a scan tool; note conditions when the code set
- Visually inspect sensor connector and wiring for corrosion, damage, pin push-out or contamination
- Wiggle wiring harness and connectors while monitoring fuel temperature PID to reproduce intermittent behavior
- Check for other related DTCs (coolant temp, fuel rail pressure sensors)
- Measure sensor connector voltage and ground with backprobe while key on/engine running
- Measure sensor resistance at sensor with connector disconnected across temperatures (cold and warm)
Signal parameters
- Typical circuit: 0–5.0 V signal to PCM (varies by manufacturer)
- Most fuel temp sensors are NTC thermistors: resistance decreases as temperature rises
- Approximate example (varies by sensor): ~2–5 kΩ at ~20°C (68°F), a few hundred ohms at high temperature (~80–90°C). Use vehicle-specific specs when available
- PCM expects a smooth, monotonic change in voltage/resistance as fuel temperature changes; rapid jumps or open/short conditions indicate a fault
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data with a scan tool. Note engine/fuel temps and operating conditions when code occurred.
- Visually inspect the fuel temperature sensor connector, pins and wiring for corrosion, looseness, damage, rodent chew or pinback. Repair as needed.
- With ignition ON (engine off) and using a multimeter/scan tool, backprobe sensor signal and ground. Verify reference voltage and ground integrity.
- Monitor live fuel temperature PID while performing a wiggle test of the harness and connector to try to reproduce the intermittent. If data jumps or code returns, suspect wiring/connector.
- With connector disconnected, measure sensor resistance at ambient and after warming (by running engine briefly or gently warming sensor). Compare to manufacturer spec. Replace sensor if resistance is erratic or out of spec.
- Check for intermittent short to battery or ground using a lab scope or backprobing while inducing movement. Repair short/chafing and retest.
- Repair or replace damaged wiring, terminals or sensor. Clear codes and road test to confirm the DTC does not return under the previously recorded conditions.
- If wiring and sensor check good and the fault persists, inspect PCM input circuits and grounds; consider OEM wiring diagrams and PCM bench testing as a last resort.
Likely causes
- Loose or corroded connector at the sensor
- Chafed wiring that makes intermittent contact when the engine vibrates
- Sensor internal intermittent (open/short under certain temperatures)
- High-resistance ground or poor mating terminals
- Intermittent short to power or ground in harness
Fault status
Status
P0184 — Fuel Temperature Sensor A Circuit Intermittent. Intermittent/unstable signal detected from the fuel temperature sensor; inspect sensor, wiring, connector and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0184
HUMMER
P — Powertrain
Fuel Temperature Sensor 1 Circuit Intermittent
Views:
UK: 5
EN: 13
RU: 8
AI status
Completed
Completed
100%
Causes
- Corroded, loose, or contaminated sensor connector
- Chafed or broken wiring harness to the fuel temperature sensor (intermittent contact)
- Internal intermittent fault in the fuel temperature sensor (NTC element)
- Poor ground or high-resistance connections in the sensor circuit
- Short to battery voltage or ground (intermittent)
- Aftermarket fuel system modification or sensor installed incorrectly
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated intermittently or steady
- Erratic or fluctuating fuel temperature PID readings on a scan tool
- Occasional drivability symptoms (hesitation, rough idle) if ECU fuel calculations are affected
- Reduced fuel economy or higher emissions in some conditions
- Often no noticeable symptom aside from the DTC
What to check
- Read freeze frame and live data with a scan tool; note conditions when the code set
- Visually inspect sensor connector and wiring for corrosion, damage, pin push-out or contamination
- Wiggle wiring harness and connectors while monitoring fuel temperature PID to reproduce intermittent behavior
- Check for other related DTCs (coolant temp, fuel rail pressure sensors)
- Measure sensor connector voltage and ground with backprobe while key on/engine running
- Measure sensor resistance at sensor with connector disconnected across temperatures (cold and warm)
Signal parameters
- Typical circuit: 0–5.0 V signal to PCM (varies by manufacturer)
- Most fuel temp sensors are NTC thermistors: resistance decreases as temperature rises
- Approximate example (varies by sensor): ~2–5 kΩ at ~20°C (68°F), a few hundred ohms at high temperature (~80–90°C). Use vehicle-specific specs when available
- PCM expects a smooth, monotonic change in voltage/resistance as fuel temperature changes; rapid jumps or open/short conditions indicate a fault
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data with a scan tool. Note engine/fuel temps and operating conditions when code occurred.
- Visually inspect the fuel temperature sensor connector, pins and wiring for corrosion, looseness, damage, rodent chew or pinback. Repair as needed.
- With ignition ON (engine off) and using a multimeter/scan tool, backprobe sensor signal and ground. Verify reference voltage and ground integrity.
- Monitor live fuel temperature PID while performing a wiggle test of the harness and connector to try to reproduce the intermittent. If data jumps or code returns, suspect wiring/connector.
- With connector disconnected, measure sensor resistance at ambient and after warming (by running engine briefly or gently warming sensor). Compare to manufacturer spec. Replace sensor if resistance is erratic or out of spec.
- Check for intermittent short to battery or ground using a lab scope or backprobing while inducing movement. Repair short/chafing and retest.
- Repair or replace damaged wiring, terminals or sensor. Clear codes and road test to confirm the DTC does not return under the previously recorded conditions.
- If wiring and sensor check good and the fault persists, inspect PCM input circuits and grounds; consider OEM wiring diagrams and PCM bench testing as a last resort.
Likely causes
- Loose or corroded connector at the sensor
- Chafed wiring that makes intermittent contact when the engine vibrates
- Sensor internal intermittent (open/short under certain temperatures)
- High-resistance ground or poor mating terminals
- Intermittent short to power or ground in harness
Fault status
Status
P0184 — Fuel Temperature Sensor A Circuit Intermittent. Intermittent/unstable signal detected from the fuel temperature sensor; inspect sensor, wiring, connector and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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+100 karma for a short comment :)
Was this AI description helpful?
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Code
P0184
LAND ROVER
P — Powertrain
Fuel temperature sensor An intermittent circuit
Views:
UK: 5
EN: 11
RU: 6
AI status
Completed
Completed
100%
Causes
- Corroded, loose, or contaminated sensor connector
- Chafed or broken wiring harness to the fuel temperature sensor (intermittent contact)
- Internal intermittent fault in the fuel temperature sensor (NTC element)
- Poor ground or high-resistance connections in the sensor circuit
- Short to battery voltage or ground (intermittent)
- Aftermarket fuel system modification or sensor installed incorrectly
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated intermittently or steady
- Erratic or fluctuating fuel temperature PID readings on a scan tool
- Occasional drivability symptoms (hesitation, rough idle) if ECU fuel calculations are affected
- Reduced fuel economy or higher emissions in some conditions
- Often no noticeable symptom aside from the DTC
What to check
- Read freeze frame and live data with a scan tool; note conditions when the code set
- Visually inspect sensor connector and wiring for corrosion, damage, pin push-out or contamination
- Wiggle wiring harness and connectors while monitoring fuel temperature PID to reproduce intermittent behavior
- Check for other related DTCs (coolant temp, fuel rail pressure sensors)
- Measure sensor connector voltage and ground with backprobe while key on/engine running
- Measure sensor resistance at sensor with connector disconnected across temperatures (cold and warm)
Signal parameters
- Typical circuit: 0–5.0 V signal to PCM (varies by manufacturer)
- Most fuel temp sensors are NTC thermistors: resistance decreases as temperature rises
- Approximate example (varies by sensor): ~2–5 kΩ at ~20°C (68°F), a few hundred ohms at high temperature (~80–90°C). Use vehicle-specific specs when available
- PCM expects a smooth, monotonic change in voltage/resistance as fuel temperature changes; rapid jumps or open/short conditions indicate a fault
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data with a scan tool. Note engine/fuel temps and operating conditions when code occurred.
- Visually inspect the fuel temperature sensor connector, pins and wiring for corrosion, looseness, damage, rodent chew or pinback. Repair as needed.
- With ignition ON (engine off) and using a multimeter/scan tool, backprobe sensor signal and ground. Verify reference voltage and ground integrity.
- Monitor live fuel temperature PID while performing a wiggle test of the harness and connector to try to reproduce the intermittent. If data jumps or code returns, suspect wiring/connector.
- With connector disconnected, measure sensor resistance at ambient and after warming (by running engine briefly or gently warming sensor). Compare to manufacturer spec. Replace sensor if resistance is erratic or out of spec.
- Check for intermittent short to battery or ground using a lab scope or backprobing while inducing movement. Repair short/chafing and retest.
- Repair or replace damaged wiring, terminals or sensor. Clear codes and road test to confirm the DTC does not return under the previously recorded conditions.
- If wiring and sensor check good and the fault persists, inspect PCM input circuits and grounds; consider OEM wiring diagrams and PCM bench testing as a last resort.
Likely causes
- Loose or corroded connector at the sensor
- Chafed wiring that makes intermittent contact when the engine vibrates
- Sensor internal intermittent (open/short under certain temperatures)
- High-resistance ground or poor mating terminals
- Intermittent short to power or ground in harness
Fault status
Status
P0184 — Fuel Temperature Sensor A Circuit Intermittent. Intermittent/unstable signal detected from the fuel temperature sensor; inspect sensor, wiring, connector and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 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