OBD Guide
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U142B

implausible Data Received From Exhaust Valve 1

U142B is an OBD-II diagnostic trouble code meaning: implausible Data Received From Exhaust Valve 1. Common causes: exhaust valve malfunction, damage to the wiring harness to the valve. Estimated repair cost: $28–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–167 (est.)

Symptoms

  • Check Engine light comes on
  • Deterioration in acceleration dynamics
  • Increased fuel consumption
  • Unstable engine operation at idle
  • Possible misfires

Causes

  • Exhaust valve malfunction
  • Damage to the wiring harness to the valve
  • Poor contact in connectors
  • Problems with ECU software
  • Short circuit in control circuit

How to Fix

  1. Check the condition of the exhaust valve
  2. Check the integrity of wiring and connectors
  3. Measure the resistance and voltage at the valve
  4. Check for ECU firmware updates
  5. If necessary, replace the faulty valve

Related codes

U142AU142CU142D

FAQ

What does the U142B code mean?

U142B is an OBD-II diagnostic trouble code that indicates: implausible Data Received From Exhaust Valve 1

What causes a U142B error code?

The most common causes of U142B include: Exhaust valve malfunction; Damage to the wiring harness to the valve; Poor contact in connectors; Problems with ECU software.

How do I fix a U142B diagnostic trouble code?

To fix U142B: Check the condition of the exhaust valve. Check the integrity of wiring and connectors. Measure the resistance and voltage at the valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U142B?

Yes, but get it checked soon

How much does it cost to fix U142B?

The estimated repair cost for U142B is $28–167. Actual cost depends on your vehicle, location, and labor rates.

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