Code
P1713
DAEWOO
P — Powertrain
Fluid temp. snsr ct-high input
Views:
UK: 1
EN: 7
RU: 4
AI status
Completed
Completed
100%
Causes
- Open or high resistance in the transmission fluid temperature sensor circuit
- Short to battery voltage on the sensor signal wire
- Failed/contaminated transmission fluid temperature sensor (thermistor)
- Poor or corroded sensor connector or ground
- Damaged wiring (chafing, corrosion, connector pin damage)
- Faulty TCM/PCM (rare)
Symptoms
- Check Engine/Transmission warning lamp (MIL) illuminated
- Erratic or harsh shift patterns, limp-in mode possible
- Incorrect transmission temperature readout (if displayed)
- Transmission may shift based on incorrect temp data (early/late shifts)
- Possible stored freeze-frame data of high temperature reading
What to check
- Read and record freeze-frame and live data with a scan tool (transmission fluid temp PID)
- Visually inspect the transmission fluid temperature sensor connector and wiring for damage, corrosion or looseness
- Back-probe sensor signal wire and measure voltage with ignition on (compare to expected range)
- Measure sensor resistance (with sensor disconnected) and compare against expected thermistor behavior
- Check for reference voltage and good ground at the sensor connector
- Wiggle test wiring while monitoring live data for intermittent faults
Signal parameters
- Typical signal voltage range: ~0.1 V to ~4.9 V (varies by vehicle); high input means voltage near battery voltage or above expected range
- Thermistor-type sensor: resistance decreases with higher temperature (NTC) — expect low ohms at hot, higher ohms at cold (typical broad range ~200–10,000 Ω depending on design)
- Expected live PID behavior: steady, plausible change as fluid warms; sudden jumps or constant max value indicate fault
- Reference/5V supply (if used) should be present and stable with respect to battery voltage
Diagnostic algorithm
- Connect a scan tool and confirm P1713 is active; record freeze-frame and monitor transmission fluid temp PID.
- Visually inspect sensor, connector and wiring harness for damage, heat exposure, corrosion, or pin push-out. Repair any obvious damage.
- With ignition ON (engine OFF), back-probe the sensor connector: verify reference voltage (if applicable), sensor signal voltage and ground continuity. Document readings.
- Disconnect the sensor and measure its resistance at ambient temperature. Compare to manufacturer specification or expected thermistor behavior (should change with temperature).
- Wiggle the harness and connector while watching live data for intermittent changes. Perform continuity checks on signal and ground wires back to the TCM/PCM connector.
- If signal wire shows high voltage (near battery) with sensor disconnected, inspect for short to 12V. Repair wiring as required.
- If wiring and connector are good but sensor resistance is out of range or does not change with temperature, replace the transmission fluid temperature sensor.
- After repair, clear codes, perform relearn if required, and road test to confirm normal temperature PID behavior and no code return.
- If fault persists after sensor and wiring verified, consider TCM/PCM input circuit testing or replacement as final step.
Likely causes
- Broken or disconnected signal/ground wire at the sensor
- Corroded or loose connector at the sensor
- Failed fluid temperature sensor
- Short to 12V on the sensor signal
- Intermittent wiring connection
Fault status
Status
P1713 - Transmission fluid temperature sensor circuit high input
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 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
👎 Dislike
0
Send to email