Code
P1712
FIAT
P — Powertrain
Lever release solenoid fault
Views:
UK: 3
EN: 3
RU: 3
AI status
Completed
Completed
100%
Causes
- Failed lever release (shift interlock) solenoid
- Open or short in solenoid wiring harness
- Corroded or loose connector at solenoid
- Blown fuse or faulty relay powering solenoid
- Poor ground or low battery voltage during command
- Internal valve body or mechanical binding preventing lever release
Symptoms
- Unable to move gear selector out of Park or stuck in gear
- Shift lock indicator lamp or message on dash
- Intermittent ability to shift or delayed release
- No audible click from solenoid when commanded
- Related transmission limp or fail-safe behavior
- Diagnostic trouble code stored; possible MIL/TRACTION light
What to check
- Read and record all stored codes and freeze-frame data with a scan tool
- Visual inspection of solenoid connector and wiring for corrosion, damage, or pin push-out
- Check fuses and relays related to transmission/shift lock circuit
- With key on, command solenoid with scan tool and listen/feel for operation
- Backprobe solenoid connector while commanding: verify supply voltage and ground/command signal
- Measure solenoid coil resistance with multimeter (compare to factory spec)
Signal parameters
- Solenoid coil resistance: typically low (single- to low-double digit ohms) — compare to factory spec
- Command voltage: near battery voltage (12V) or switched ground depending on design when activated
- PWM control: some systems use PWM duty cycle; frequency often tens to a few hundred Hz
- No voltage or infinite resistance indicates open circuit; near-zero resistance indicates short to ground
Diagnostic algorithm
- Connect scan tool, read/record P1712 and any other codes; note operating conditions and freeze-frame data.
- Perform visual inspection: battery condition, fuses/relays, connector and wiring at the solenoid; repair obvious damage.
- With key ON (engine off) command the lever release solenoid via scan tool while an assistant listens/feels for activation.
- Backprobe the solenoid connector while commanding: verify the presence of supply voltage and the switching/grounding command. If no command present, suspect TCM or wiring between TCM and solenoid.
- Measure solenoid coil resistance with the connector disconnected. Compare to factory spec. Infinite or very high = open; very low = short/coil fault.
- Perform wiggle test on harness and connectors while commanding to check intermittent faults.
- If electrical tests are good but solenoid does not actuate, remove and bench-test the solenoid or install a known-good unit. Inspect valve body and lever linkage for mechanical binding.
- Repair or replace failed wiring, connector, fuse/relay, or solenoid as indicated. Clear codes and road test to confirm repair.
- If fault returns and wiring/solenoid are good, consider TCM diagnostic or reprogramming and consult dealer-level diagnostics.
Likely causes
- Solenoid coil open or short
- Corroded/loose connector or pin damage
- Blown fuse or loss of supply/ground
- Mechanical binding in lever or valve body preventing operation
Fault status
Status
P1712 — Lever release solenoid fault detected. Check solenoid, wiring/connectors, fuses/relays and TCM control. Mechanical binding of lever/valve body may also prevent release.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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