Code
P1132
DAEWOO
P — Powertrain
LIQUID FUEL SOL. FAULT
Views:
UK: 1
EN: 6
RU: 2
AI status
Completed
Completed
100%
Causes
- Open or shorted solenoid coil
- Damaged wiring or connector (corrosion, broken wire, poor pin contact)
- Blown fuse or faulty relay feeding the solenoid
- Poor ground at solenoid or ECM
- Stuck or mechanically failed solenoid (does not move)
- Faulty ECM driver or internal ECU fault
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Engine cranks but will not start or difficult to start
- Intermittent stalling or no-start condition
- Loss of fuel shutoff function (engine may continue running when it should stop) or fuel flow control issues
- Reduced engine performance or misfire if solenoid controls injection timing/quantity
What to check
- Retrieve DTCs and freeze frame data with a scan tool; note conditions when code set
- Verify battery voltage (key ON and during cranking) is within specification
- Visually inspect wiring and connector at the liquid fuel solenoid for corrosion, pin damage, or water intrusion
- Check related fuses and relays for continuity and proper operation
- Back-probe connector to measure supply voltage and ground with key ON and while commanded
- Measure solenoid coil resistance with an ohmmeter
Signal parameters
- Nominal coil resistance (typical): 5–30 ohms (vehicle-specific; consult service manual)
- Supply voltage (key ON): ~11–14 V at solenoid supply pin when fuse/relay is good
- Control signal: either switched ground or battery via ECM; activation will show voltage change or PWM depending on system
- Activation current: dependent on coil, typically hundreds of mA; excessive current may indicate short, very low current indicates open circuit
- ECM driver output (when activated): 0 V (ground-switch) or +12 V (supply-switch) depending on design; some systems use PWM (0–100% duty)
Diagnostic algorithm
- Read and record all stored codes and freeze-frame data. Clear codes and attempt to reproduce to confirm P1132 returns.
- Check battery voltage and charging system. Weak battery or poor charging can cause false faults.
- Visually inspect solenoid connector and wiring harness for damaged insulation, corrosion, or loose pins. Repair as necessary.
- Verify fuses and relays in the solenoid supply circuit; replace if faulty.
- With connector disconnected, measure solenoid coil resistance. Compare to specification. Replace solenoid if open or out-of-range.
- With key ON, back-probe the connector to check for proper supply voltage and a reliable ground or control signal. Command the solenoid ON with a scan tool while observing voltage/current.
- If control is PWM, view the waveform with an oscilloscope to confirm proper switching and duty cycle. Look for short-circuits or floating outputs.
- Perform a bench test: apply appropriate voltage to the solenoid to verify it actuates (observe movement/click or measure current).
- If wiring and solenoid test good, test the ECM driver output. If driver is open/shorted, consult manufacturer procedures — ECM replacement or repair may be required.
- After repairs, clear codes and perform a functional test/road test. Confirm code does not return and operation is restored.
Likely causes
- Corroded/loose connector at the solenoid
- Open or high-resistance solenoid coil
- Short to ground or short to battery in the solenoid harness
- Blown fuse or failed relay in fuel solenoid circuit
Fault status
Status
Liquid Fuel Solenoid Circuit Fault — check solenoid, wiring, fuses/relay, and ECM driver.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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