Code
P1032
DACIA
P — Powertrain
Injector 5 - circuit malfunction
Views:
UK: 2
EN: 6
RU: 8
AI status
Completed
Completed
100%
Causes
- Open or short in injector 5 wiring (connector, harness, broken wire)
- Corroded, loose or contaminated injector connector
- Failed fuel injector (electrical coil short or open)
- Faulty ECM/PCM injector driver (output transistor)
- Blown fuse or faulty power/ground supply for injector rail
- Water/oil contamination inside connector or injector
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light on
- Rough idle, misfire, or cylinder #5 misfire
- Reduced engine power and drivability problems
- Hard starting or poor acceleration
- Increased fuel consumption and higher emissions
- Intermittent faults if wiring/connector is intermittent
What to check
- Read stored freeze-frame and related trouble codes (note misfire or other injector codes)
- Visually inspect injector #5 connector and wiring for damage or corrosion
- Check fuses and power/ground supply for the fuel injector circuit
- Measure injector #5 static resistance with multimeter
- Back-probe connector to check for +12 V supply and ground/ECM control signal when cranking
- Use a scan tool to command injector #5 and confirm activation
Signal parameters
- Injector static resistance: typically ~1–20 ohms depending on injector type (consult vehicle service data)
- Supply voltage at connector: approximately battery voltage (~11–14.5 V with ignition on)
- Control signal: low-side switching by ECM (pulse width varies with load; typical pulses 1–10 ms)
- Expected injector drive waveform: clean square pulses with sharp transitions (use oscilloscope)
- Acceptable continuity: no open circuit; low/very low resistance may indicate shorted coil
Diagnostic algorithm
- Retrieve all DTCs and freeze-frame data; note any misfire (P0305) or related codes.
- Perform a visual inspection of injector #5 connector, wiring harness, and nearby components for damage, corrosion, or chafing.
- Check fuse(s) and main power/ground for fuel injectors and ECM; repair any faults.
- With ignition off, disconnect injector #5 and measure coil resistance across pins; compare to specification. Replace injector if out of range.
- With connector connected, back-probe the power pin to confirm battery voltage present with ignition on.
- Crank engine and back-probe control pin; look for switching (pulses) using a test light, multimeter, or preferably an oscilloscope. No switching suggests ECM driver or wiring open.
- Wiggle wiring and connector while monitoring signal to check for intermittent faults.
- If available, command the injector ON/OFF with a diagnostic tool and verify operation (listen for click or observe current draw).
- Swap injectors between cylinder 5 and another cylinder and clear codes. If code follows injector, replace injector. If code remains on cylinder 5, suspect wiring or ECM.
- If wiring and injector check OK, perform resistance/continuity test from injector connector back to ECM pin and inspect ECM grounds. Repair harness as needed.
- If wiring and grounds are good and injector still fails, test/replace ECM driver circuit (follow manufacturer procedure) or replace ECM if confirmed faulty.
- After repair, clear codes and road/test to confirm repair; monitor for reappearance.
Likely causes
- Damaged or corroded connector/pin at injector 5
- Broken or chafed wire between injector 5 and ECM
- Failed injector coil (open or short)
- ECM driver stage failure (less common)
- Intermittent power or ground to injector rail
Fault status
Status
P1032 - Injector 5 circuit malfunction: ECM detected open/short/poor connection in injector #5 electrical circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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