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P1213 — Start Injector Circuit Malfunction

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Code

P1213

FORD P — Powertrain

Start Injector Circuit Malfunction

Brand: FORD
Views: UK: 20 EN: 44 RU: 18
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

KIA P — Powertrain

Fuel Injector 1 Circuit High Voltage

Brand: KIA
Views: UK: 20 EN: 43 RU: 18
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

LINCOLN P — Powertrain

Start Injector Circuit Malfunction

Brand: LINCOLN
Views: UK: 18 EN: 40 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

MAZDA P — Powertrain

Start Injector Circuit

Brand: MAZDA
Views: UK: 21 EN: 36 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

MERCURY P — Powertrain

Start Injector Circuit Malfunction

Brand: MERCURY
Views: UK: 20 EN: 44 RU: 21
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

Other P — Powertrain

Start Injector Circuit Malfunction

Brand: Other
Views: UK: 17 EN: 41 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

PORSCHE P — Powertrain

Fuel injector, cylinder 1

Brand: PORSCHE
Views: UK: 1 EN: 8 RU: 3
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

SAAB P — Powertrain

Injector Cyl. 1, Control Module Output, Short To B+

Brand: SAAB
Views: UK: 0 EN: 1 RU: 0
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P1213

VOLKSWAGEN P — Powertrain

Cylinder 1 Fuel Injector Circuit Short To B+

Views: UK: 19 EN: 41 RU: 21
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Causes

  • Open or shorted wiring in the start injector circuit
  • Corroded, loose or damaged injector connector or terminals
  • Failed start (auxiliary) injector
  • Faulty injector driver in PCM/ECM
  • Blown fuse, faulty relay, or loss of power to injector supply
  • Poor or missing ground at injector or module

Symptoms

  • Engine cranks but does not start or has extended cranking
  • No injector activation during start sequence
  • Reduced or inconsistent starting performance
  • Possible stored DTC P1213 and related injector circuit codes
  • Intermittent starting or one-time no-start condition

What to check

  • Read freeze frame and related codes with a scan tool; note conditions when fault set
  • Inspect wiring harness and connector for the start injector for corrosion, damage, pins pushed out or water intrusion
  • Check fuses and relays that supply the injector circuit
  • Backprobe injector connector and measure supply voltage (Key On, Engine Off and during cranking)
  • Measure injector coil DC resistance and compare to vehicle service spec
  • Check ground integrity for the injector and PCM grounds

Signal parameters

  • Injector supply voltage: battery voltage (approx. 11–14.5 V) with key ON and during cranking; should be near battery voltage
  • Injector coil DC resistance: consult service manual for exact spec; typical start/aux injectors are low-impedance (approx. 0.5–3 ohms) — verify against vehicle spec
  • Control signal: PCM should provide a pulsed ground or switched voltage during cranking; pulse width and frequency vary by engine and condition — confirm with oscilloscope or scan tool
  • No-voltage condition, short-to-ground or short-to-VB will be abnormal and indicate wiring or driver fault

Diagnostic algorithm

  1. Retrieve DTCs and freeze frame; record conditions (battery voltage, engine temp, crank time). Check for related codes (injector circuits, power/ground faults).
  2. Visually inspect the start injector connector and harness for damage, corrosion, or contaminated terminals. Repair or clean as needed.
  3. Verify power to the injector: with key ON, check for battery voltage at the injector supply terminal. Check related fuse(s) and relay(s).
  4. Verify ground: check continuity from injector ground terminal to chassis/PCM ground points. Repair poor grounds.
  5. Measure injector coil resistance (engine off, connector disconnected) and compare to spec. Replace injector if out of spec.
  6. Backprobe the control pin at the injector while cranking and monitor with a DVOM or oscilloscope to confirm PCM is commanding the injector (look for pulses).
  7. If no command from PCM but wiring and power/ground are good, check continuity between injector connector and PCM driver pin. If open or shorted, repair wiring.
  8. If wiring and connectors are good and PCM does not command the injector when it should, suspect PCM injector driver fault. Confirm by substituting a known-good injector driver (if serviceable) or consult manufacturer guidance before replacing PCM.
  9. After repairs, clear codes and perform multiple crank/start cycles to verify fault does not return; road or start-test as required by procedure.

Likely causes

  • Damaged/loose connector at the start injector
  • Open or shorted wiring between injector and PCM
  • Blown fuse or faulty relay supplying the injector
  • Failed start injector
  • PCM driver fault (less common)

Fault status

⚠️ Status
P1213 - Start Injector Circuit Malfunction. The engine control module detected an electrical fault (open/short/incorrect signal) in the start/auxiliary injector circuit during cranking.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Your experience will help others
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