Code
P1210
CITROEN
P — Powertrain
Fuel pressure regulation electrovalve open circuit
Views:
UK: 2
EN: 6
RU: 9
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
DS
P — Powertrain
Fuel pressure regulation electrovalve open circuit
Views:
UK: 1
EN: 3
RU: 3
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
FORD
P — Powertrain
Injector Control Pressure Above Expected Level
Views:
UK: 11
EN: 36
RU: 36
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
LINCOLN
P — Powertrain
Injector Control Pressure Above Expected Level
Views:
UK: 12
EN: 34
RU: 38
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
MERCURY
P — Powertrain
Injector Control Pressure Above Expected Level
Views:
UK: 14
EN: 34
RU: 39
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
MITSUBISHI
P — Powertrain
Intake throttle valve
Views:
UK: 6
EN: 16
RU: 21
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
NISSAN
P — Powertrain
Traction Control System Signal Fault
Views:
UK: 15
EN: 34
RU: 36
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
Other
P — Powertrain
Injector Control Pressure Above Expected Level
Views:
UK: 15
EN: 34
RU: 39
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 1
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.
Key sections:
Buy - 01 - INTRODUCTION
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- - Dimensions
- - References
- - Repairs and replacements
- - Poisonous substances
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- - Recommended sealants
- - Used engine oil precautions
- - Accessories and conversions
- - Wheels and tyres
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Code
P1210
PEUGEOT
P — Powertrain
Fuel pressure regulation electrovalve open circuit
Views:
UK: 1
EN: 2
RU: 4
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
RAM
P — Powertrain
Engine Oil Cooler Control Circuit
Views:
UK: 2
EN: 5
RU: 8
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
SCION
P — Powertrain
Injector control circuit malfunction
Views:
UK: 1
EN: 4
RU: 3
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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Code
P1210
VOLKSWAGEN
P — Powertrain
Intake Valves For Cylinder Shut-Off Short To B+
Views:
UK: 11
EN: 35
RU: 34
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between ECU and fuel pressure regulation electrovalve
- Corroded, bent or disconnected connector at the electrovalve
- Faulty electrovalve (coil open)
- Blown fuse or faulty relay supplying the fuel control circuit
- Poor ground or high resistance in ground path
- Intermittent harness damage (pinched, chafed or water ingress)
Symptoms
- MIL/engine warning lamp illuminated
- Engine may enter limp mode / reduced power
- Hard starting or extended cranking
- Rough idle, hesitation or stalling
- Poor fuel economy or abnormal smoke (diesel)
- Stored related fuel pressure or performance fault codes
What to check
- Retrieve full ECU fault memory and freeze frame data with a scan tool
- Visual inspection of electrovalve connector, pins and wiring for corrosion, damage or contamination
- Check related fuses and relays for continuity and correct operation
- Measure supply voltage at the electrovalve connector with ignition ON
- Measure coil resistance across the electrovalve terminals (compare to spec)
- Check continuity between electrovalve connector and ECU pin (wiring continuity)
Signal parameters
- Supply voltage (feed): approx. battery voltage (about 11–14 V) at feed pin with ignition ON
- Control signal: ECU typically uses switched ground or PWM to operate the valve; duty cycle varies with engine demand
- Coil resistance: follow manufacturer specification — typically low‑impedance valves ~1–30 Ω or high‑impedance valves ~40–200 Ω (consult Citroën data)
- Open‑circuit indication: infinite/very high resistance between electrovalve terminals or between terminal and ECU
- Expected ground continuity from electrovalve ground pin to ECU / chassis ground when commanded
Diagnostic algorithm
- Read and record all stored codes and live data. Note fuel pressure values and freeze frame conditions.
- Visually inspect the electrovalve connector, wiring harness and nearby components for damage, corrosion or water ingress.
- Inspect and test related fuses and relays. Replace if faulty.
- With ignition ON (engine OFF), measure battery supply voltage at the electrovalve feed pin. Confirm presence of supply.
- Measure coil resistance across the electrovalve terminals. If resistance is infinite/open, suspect a failed coil or broken internal connection.
- Check continuity between the electrovalve connector and the ECU pin. Repair any open circuits or high resistance.
- Backprobe the control line while commanding the valve with a diagnostic tool to observe voltage/PWM and switching behavior. Use an oscilloscope if available to confirm PWM characteristics.
- If wiring and supply are good but valve behaviour is abnormal, bench‑test the electrovalve (apply known battery voltage and observe operation) or replace the valve.
- If wiring and valve test OK, consider ECU driver fault — verify with wiring short tests and consult manufacturer technical service information before replacing ECU.
- After repair, clear codes and perform a test drive. Re‑check for reappearance of the code and confirm fuel pressure and drivability are normal.
Likely causes
- Broken/open wire or poor connector at the electrovalve
- Electrovalve coil failure (open circuit)
- Faulty fuse/relay or poor ground connection
Fault status
Status
Fuel pressure regulation electrovalve open circuit — electrical open/high resistance detected in fuel pressure regulator solenoid circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 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
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0
Send to email