Code
P0190
Generic
P — Powertrain
Fuel Rail Pressure Sensor Circuit Bank 1
Views:
UK: 36
EN: 132
RU: 80
AI status
Completed
Completed
100%
Causes
- Open or shorted signal wire between FRP sensor and ECM
- Corroded, loose or damaged connector/pins at the sensor or ECM
- Failed fuel rail pressure sensor
- Loss of sensor reference voltage (typically +5 V) or sensor ground
- Intermittent wiring harness damage (chafing, water intrusion)
- ECM internal fault or software issue
Symptoms
- Check Engine Light (MIL) ON
- Reduced engine power or limp-home mode
- Hard start or no-start conditions
- Rough idle or engine hesitation
- Poor fuel economy
- Stored drivability codes related to fuel or pressure control
What to check
- Read freeze frame and freeze data with a scan tool; note engine conditions when the code set
- Visually inspect FRP sensor connector and wiring for damage, corrosion, or oil/contaminant intrusion
- Wiggle test wiring while monitoring live FRP sensor data to find intermittent faults
- Backprobe sensor connector and verify reference voltage (~5.0 V) with key ON, engine OFF
- Check sensor ground continuity to chassis/ECM ground
- Measure sensor signal voltage while cranking and during running; compare to expected range
Signal parameters
- Sensor reference (Vref): typically ≈ 5.0 V (key ON, engine OFF) — verify manufacturer spec
- Sensor ground: near 0 Ω continuity to engine/ECM ground
- Sensor signal output: typically ~0.5–4.5 V across pressure range (low to high) — confirm exact mapping in service data
- Expected idle/ambient pressure voltage: varies by vehicle; use OEM chart or live data
- No open-circuit: signal should not be floating (open) or hard to battery voltage or ground
Diagnostic algorithm
- Retrieve stored DTCs and freeze-frame data. Confirm P0190 and note operating conditions when fault occurred.
- Perform a visual inspection of the FRP sensor, connector, and wiring for damage, corrosion, or oil contamination. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify Vref (~5 V), sensor ground continuity, and signal wire voltage. If Vref or ground missing, trace power/ground to ECM.
- Start engine (if safe) and monitor FRP live data and sensor voltage with a scan tool. Watch for out-of-range or erratic readings while varying load/engine speed.
- Perform a wiggle test on wiring and connectors while observing live data or DTC status to identify intermittent faults.
- If wiring/power/ground are good, disconnect sensor and measure sensor resistance/voltage per OEM spec. Replace sensor if out of spec.
- Check for shorts to battery or ground on the signal wire (measure resistance to battery + and to ground). Repair wiring faults as required.
- After repairs or replacement, clear codes and perform a road test to confirm the fault does not return. If fault persists and wiring checks good, consider ECM diagnosis or replacement.
Likely causes
- Damaged/shorted signal or power/ground wiring to FRP sensor
- Corroded/loose connector or bent pins at sensor
- Failed FRP sensor (common)
- Bad sensor reference voltage or ground circuit
- Intermittent connector/harness fault near the rail
Fault status
Status
Fuel Rail Pressure Sensor Circuit — Bank 1 (circuit fault detected)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
P0190
GWM
P — Powertrain
- Fuel temperature sensor circuit fault
Views:
UK: 16
EN: 28
RU: 37
AI status
Completed
Completed
100%
Causes
- Open or shorted signal wire between FRP sensor and ECM
- Corroded, loose or damaged connector/pins at the sensor or ECM
- Failed fuel rail pressure sensor
- Loss of sensor reference voltage (typically +5 V) or sensor ground
- Intermittent wiring harness damage (chafing, water intrusion)
- ECM internal fault or software issue
Symptoms
- Check Engine Light (MIL) ON
- Reduced engine power or limp-home mode
- Hard start or no-start conditions
- Rough idle or engine hesitation
- Poor fuel economy
- Stored drivability codes related to fuel or pressure control
What to check
- Read freeze frame and freeze data with a scan tool; note engine conditions when the code set
- Visually inspect FRP sensor connector and wiring for damage, corrosion, or oil/contaminant intrusion
- Wiggle test wiring while monitoring live FRP sensor data to find intermittent faults
- Backprobe sensor connector and verify reference voltage (~5.0 V) with key ON, engine OFF
- Check sensor ground continuity to chassis/ECM ground
- Measure sensor signal voltage while cranking and during running; compare to expected range
Signal parameters
- Sensor reference (Vref): typically ≈ 5.0 V (key ON, engine OFF) — verify manufacturer spec
- Sensor ground: near 0 Ω continuity to engine/ECM ground
- Sensor signal output: typically ~0.5–4.5 V across pressure range (low to high) — confirm exact mapping in service data
- Expected idle/ambient pressure voltage: varies by vehicle; use OEM chart or live data
- No open-circuit: signal should not be floating (open) or hard to battery voltage or ground
Diagnostic algorithm
- Retrieve stored DTCs and freeze-frame data. Confirm P0190 and note operating conditions when fault occurred.
- Perform a visual inspection of the FRP sensor, connector, and wiring for damage, corrosion, or oil contamination. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify Vref (~5 V), sensor ground continuity, and signal wire voltage. If Vref or ground missing, trace power/ground to ECM.
- Start engine (if safe) and monitor FRP live data and sensor voltage with a scan tool. Watch for out-of-range or erratic readings while varying load/engine speed.
- Perform a wiggle test on wiring and connectors while observing live data or DTC status to identify intermittent faults.
- If wiring/power/ground are good, disconnect sensor and measure sensor resistance/voltage per OEM spec. Replace sensor if out of spec.
- Check for shorts to battery or ground on the signal wire (measure resistance to battery + and to ground). Repair wiring faults as required.
- After repairs or replacement, clear codes and perform a road test to confirm the fault does not return. If fault persists and wiring checks good, consider ECM diagnosis or replacement.
Likely causes
- Damaged/shorted signal or power/ground wiring to FRP sensor
- Corroded/loose connector or bent pins at sensor
- Failed FRP sensor (common)
- Bad sensor reference voltage or ground circuit
- Intermittent connector/harness fault near the rail
Fault status
Status
Fuel Rail Pressure Sensor Circuit — Bank 1 (circuit fault detected)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
P0190
HUMMER
P — Powertrain
Fuel Rail Pressure Sensor Circuit
Views:
UK: 26
EN: 46
RU: 57
AI status
Completed
Completed
100%
Causes
- Open or shorted signal wire between FRP sensor and ECM
- Corroded, loose or damaged connector/pins at the sensor or ECM
- Failed fuel rail pressure sensor
- Loss of sensor reference voltage (typically +5 V) or sensor ground
- Intermittent wiring harness damage (chafing, water intrusion)
- ECM internal fault or software issue
Symptoms
- Check Engine Light (MIL) ON
- Reduced engine power or limp-home mode
- Hard start or no-start conditions
- Rough idle or engine hesitation
- Poor fuel economy
- Stored drivability codes related to fuel or pressure control
What to check
- Read freeze frame and freeze data with a scan tool; note engine conditions when the code set
- Visually inspect FRP sensor connector and wiring for damage, corrosion, or oil/contaminant intrusion
- Wiggle test wiring while monitoring live FRP sensor data to find intermittent faults
- Backprobe sensor connector and verify reference voltage (~5.0 V) with key ON, engine OFF
- Check sensor ground continuity to chassis/ECM ground
- Measure sensor signal voltage while cranking and during running; compare to expected range
Signal parameters
- Sensor reference (Vref): typically ≈ 5.0 V (key ON, engine OFF) — verify manufacturer spec
- Sensor ground: near 0 Ω continuity to engine/ECM ground
- Sensor signal output: typically ~0.5–4.5 V across pressure range (low to high) — confirm exact mapping in service data
- Expected idle/ambient pressure voltage: varies by vehicle; use OEM chart or live data
- No open-circuit: signal should not be floating (open) or hard to battery voltage or ground
Diagnostic algorithm
- Retrieve stored DTCs and freeze-frame data. Confirm P0190 and note operating conditions when fault occurred.
- Perform a visual inspection of the FRP sensor, connector, and wiring for damage, corrosion, or oil contamination. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify Vref (~5 V), sensor ground continuity, and signal wire voltage. If Vref or ground missing, trace power/ground to ECM.
- Start engine (if safe) and monitor FRP live data and sensor voltage with a scan tool. Watch for out-of-range or erratic readings while varying load/engine speed.
- Perform a wiggle test on wiring and connectors while observing live data or DTC status to identify intermittent faults.
- If wiring/power/ground are good, disconnect sensor and measure sensor resistance/voltage per OEM spec. Replace sensor if out of spec.
- Check for shorts to battery or ground on the signal wire (measure resistance to battery + and to ground). Repair wiring faults as required.
- After repairs or replacement, clear codes and perform a road test to confirm the fault does not return. If fault persists and wiring checks good, consider ECM diagnosis or replacement.
Likely causes
- Damaged/shorted signal or power/ground wiring to FRP sensor
- Corroded/loose connector or bent pins at sensor
- Failed FRP sensor (common)
- Bad sensor reference voltage or ground circuit
- Intermittent connector/harness fault near the rail
Fault status
Status
Fuel Rail Pressure Sensor Circuit — Bank 1 (circuit fault detected)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
P0190
LAND ROVER
P — Powertrain
Malfunction of the fuel rail pressure sensor circuit
Views:
UK: 21
EN: 31
RU: 53
AI status
Completed
Completed
100%
Causes
- Open or shorted signal wire between FRP sensor and ECM
- Corroded, loose or damaged connector/pins at the sensor or ECM
- Failed fuel rail pressure sensor
- Loss of sensor reference voltage (typically +5 V) or sensor ground
- Intermittent wiring harness damage (chafing, water intrusion)
- ECM internal fault or software issue
Symptoms
- Check Engine Light (MIL) ON
- Reduced engine power or limp-home mode
- Hard start or no-start conditions
- Rough idle or engine hesitation
- Poor fuel economy
- Stored drivability codes related to fuel or pressure control
What to check
- Read freeze frame and freeze data with a scan tool; note engine conditions when the code set
- Visually inspect FRP sensor connector and wiring for damage, corrosion, or oil/contaminant intrusion
- Wiggle test wiring while monitoring live FRP sensor data to find intermittent faults
- Backprobe sensor connector and verify reference voltage (~5.0 V) with key ON, engine OFF
- Check sensor ground continuity to chassis/ECM ground
- Measure sensor signal voltage while cranking and during running; compare to expected range
Signal parameters
- Sensor reference (Vref): typically ≈ 5.0 V (key ON, engine OFF) — verify manufacturer spec
- Sensor ground: near 0 Ω continuity to engine/ECM ground
- Sensor signal output: typically ~0.5–4.5 V across pressure range (low to high) — confirm exact mapping in service data
- Expected idle/ambient pressure voltage: varies by vehicle; use OEM chart or live data
- No open-circuit: signal should not be floating (open) or hard to battery voltage or ground
Diagnostic algorithm
- Retrieve stored DTCs and freeze-frame data. Confirm P0190 and note operating conditions when fault occurred.
- Perform a visual inspection of the FRP sensor, connector, and wiring for damage, corrosion, or oil contamination. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify Vref (~5 V), sensor ground continuity, and signal wire voltage. If Vref or ground missing, trace power/ground to ECM.
- Start engine (if safe) and monitor FRP live data and sensor voltage with a scan tool. Watch for out-of-range or erratic readings while varying load/engine speed.
- Perform a wiggle test on wiring and connectors while observing live data or DTC status to identify intermittent faults.
- If wiring/power/ground are good, disconnect sensor and measure sensor resistance/voltage per OEM spec. Replace sensor if out of spec.
- Check for shorts to battery or ground on the signal wire (measure resistance to battery + and to ground). Repair wiring faults as required.
- After repairs or replacement, clear codes and perform a road test to confirm the fault does not return. If fault persists and wiring checks good, consider ECM diagnosis or replacement.
Likely causes
- Damaged/shorted signal or power/ground wiring to FRP sensor
- Corroded/loose connector or bent pins at sensor
- Failed FRP sensor (common)
- Bad sensor reference voltage or ground circuit
- Intermittent connector/harness fault near the rail
Fault status
Status
Fuel Rail Pressure Sensor Circuit — Bank 1 (circuit fault detected)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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+100 karma for a short comment :)
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Code
P0190
MITSUBISHI
P — Powertrain
Fuel pressure sensor 1
Views:
UK: 22
EN: 39
RU: 58
AI status
Completed
Completed
100%
Causes
- Open or shorted signal wire between FRP sensor and ECM
- Corroded, loose or damaged connector/pins at the sensor or ECM
- Failed fuel rail pressure sensor
- Loss of sensor reference voltage (typically +5 V) or sensor ground
- Intermittent wiring harness damage (chafing, water intrusion)
- ECM internal fault or software issue
Symptoms
- Check Engine Light (MIL) ON
- Reduced engine power or limp-home mode
- Hard start or no-start conditions
- Rough idle or engine hesitation
- Poor fuel economy
- Stored drivability codes related to fuel or pressure control
What to check
- Read freeze frame and freeze data with a scan tool; note engine conditions when the code set
- Visually inspect FRP sensor connector and wiring for damage, corrosion, or oil/contaminant intrusion
- Wiggle test wiring while monitoring live FRP sensor data to find intermittent faults
- Backprobe sensor connector and verify reference voltage (~5.0 V) with key ON, engine OFF
- Check sensor ground continuity to chassis/ECM ground
- Measure sensor signal voltage while cranking and during running; compare to expected range
Signal parameters
- Sensor reference (Vref): typically ≈ 5.0 V (key ON, engine OFF) — verify manufacturer spec
- Sensor ground: near 0 Ω continuity to engine/ECM ground
- Sensor signal output: typically ~0.5–4.5 V across pressure range (low to high) — confirm exact mapping in service data
- Expected idle/ambient pressure voltage: varies by vehicle; use OEM chart or live data
- No open-circuit: signal should not be floating (open) or hard to battery voltage or ground
Diagnostic algorithm
- Retrieve stored DTCs and freeze-frame data. Confirm P0190 and note operating conditions when fault occurred.
- Perform a visual inspection of the FRP sensor, connector, and wiring for damage, corrosion, or oil contamination. Repair obvious damage.
- With key ON (engine OFF) backprobe the connector: verify Vref (~5 V), sensor ground continuity, and signal wire voltage. If Vref or ground missing, trace power/ground to ECM.
- Start engine (if safe) and monitor FRP live data and sensor voltage with a scan tool. Watch for out-of-range or erratic readings while varying load/engine speed.
- Perform a wiggle test on wiring and connectors while observing live data or DTC status to identify intermittent faults.
- If wiring/power/ground are good, disconnect sensor and measure sensor resistance/voltage per OEM spec. Replace sensor if out of spec.
- Check for shorts to battery or ground on the signal wire (measure resistance to battery + and to ground). Repair wiring faults as required.
- After repairs or replacement, clear codes and perform a road test to confirm the fault does not return. If fault persists and wiring checks good, consider ECM diagnosis or replacement.
Likely causes
- Damaged/shorted signal or power/ground wiring to FRP sensor
- Corroded/loose connector or bent pins at sensor
- Failed FRP sensor (common)
- Bad sensor reference voltage or ground circuit
- Intermittent connector/harness fault near the rail
Fault status
Status
Fuel Rail Pressure Sensor Circuit — Bank 1 (circuit fault detected)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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0
Send to email