OBD Guide
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P140B

Exhaust Gas Recirculation Slow Response Increasing Flow

P140B is an OBD-II diagnostic trouble code meaning: Exhaust Gas Recirculation Slow Response Increasing Flow. Common causes: dirty or clogged egr valve, egr solenoid valve malfunction. Estimated repair cost: $17–78.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–78 (est.)

Symptoms

  • Unstable engine idling
  • Engine power drop
  • Increased fuel consumption
  • Check Engine Light Is On
  • Dips during acceleration

Causes

  • Dirty or clogged EGR valve
  • EGR solenoid valve malfunction
  • Damaged or clogged EGR tubes
  • EGR valve vacuum control problems
  • EGR valve position sensor malfunction

How to Fix

  1. Check the condition of the EGR valve and clean or replace if necessary
  2. Check the vacuum tubes of the EGR system for leaks
  3. Test the operation of the EGR solenoid valve
  4. Check the electrical connections of the EGR valve position sensor
  5. Diagnose the EGR valve control circuit

Related codes

P0401P0404P0405

FAQ

What does the P140B code mean?

P140B is an OBD-II diagnostic trouble code that indicates: Exhaust Gas Recirculation Slow Response Increasing Flow

What causes a P140B error code?

The most common causes of P140B include: Dirty or clogged EGR valve; EGR solenoid valve malfunction; Damaged or clogged EGR tubes; EGR valve vacuum control problems.

How do I fix a P140B diagnostic trouble code?

To fix P140B: Check the condition of the EGR valve and clean or replace if necessary. Check the vacuum tubes of the EGR system for leaks. Test the operation of the EGR solenoid valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P140B?

Yes, but get it checked soon

How much does it cost to fix P140B?

The estimated repair cost for P140B is $17–78. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat