U1420
Implausible Electronic Gear Select Signal Received
U1420 is an OBD-II diagnostic trouble code meaning: Implausible Electronic Gear Select Signal Received. Common causes: gear selector position sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–89.
Symptoms
- Incorrect display of the current gear on the instrument panel
- Difficulty shifting gears
- Transmission transition to emergency mode
- Malfunction indicator light comes on
- Inability to start the engine (in some models)
Causes
- Gear selector position sensor malfunction
- Open or short circuit in the sensor circuit
- Oxidation of contacts in connectors
- Mechanical damage to the gear shift lever
- Problems with the transmission control module
How to Fix
- Check the condition of the gear selector position sensor
- Check the integrity of the wiring and contacts in the sensor circuit
- Clean connector contacts from oxides
- Check the mechanical part of the gear shift system
- If necessary, replace the selector lever position sensor
- Perform transmission control module diagnostics
Related codes
FAQ
What does the U1420 code mean?
U1420 is an OBD-II diagnostic trouble code that indicates: Implausible Electronic Gear Select Signal Received
What causes a U1420 error code?
The most common causes of U1420 include: Gear selector position sensor malfunction; Open or short circuit in the sensor circuit; Oxidation of contacts in connectors; Mechanical damage to the gear shift lever.
How do I fix a U1420 diagnostic trouble code?
To fix U1420: Check the condition of the gear selector position sensor. Check the integrity of the wiring and contacts in the sensor circuit. Clean connector contacts from oxides. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1420?
Limited driving only, diagnose soon
How much does it cost to fix U1420?
The estimated repair cost for U1420 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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