U1400
Implausible TPS Signal Received
U1400 is an OBD-II diagnostic trouble code meaning: Implausible TPS Signal Received. Common causes: throttle position sensor malfunction, contamination or mechanical damage to the throttle valve. Estimated repair cost: $17–56.
Symptoms
- Unstable engine idling
- Dips when pressing the gas pedal
- Increased fuel consumption
- Check Engine Light Illuminates
- Reduced engine power
Causes
- Throttle Position Sensor Malfunction
- Contamination or mechanical damage to the throttle valve
- Problems with sensor wiring or contacts
- Malfunction of the electronic control unit
- Short circuit or open circuit in the sensor circuit
How to Fix
- Check the condition of the throttle valve and clean if necessary
- Check the integrity of the wiring and contacts of the sensor
- Test the throttle position sensor
- Replace sensor if necessary
- Check and, if necessary, reflash the ECU
Related codes
FAQ
What does the U1400 code mean?
U1400 is an OBD-II diagnostic trouble code that indicates: Implausible TPS Signal Received
What causes a U1400 error code?
The most common causes of U1400 include: Throttle Position Sensor Malfunction; Contamination or mechanical damage to the throttle valve; Problems with sensor wiring or contacts; Malfunction of the electronic control unit.
How do I fix a U1400 diagnostic trouble code?
To fix U1400: Check the condition of the throttle valve and clean if necessary. Check the integrity of the wiring and contacts of the sensor. Test the throttle position sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1400?
Yes, but get it checked soon
How much does it cost to fix U1400?
The estimated repair cost for U1400 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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