OBD Guide
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P140C

Exhaust Gas Recirculation Slow Response Decreasing Flow

P140C is an OBD-II diagnostic trouble code meaning: Exhaust Gas Recirculation Slow Response Decreasing Flow. Common causes: dirty or stuck egr valve, egr solenoid valve malfunction. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine light comes on
  • Deterioration in acceleration dynamics
  • Increased fuel consumption
  • Unstable engine idling
  • Increased emissions of harmful substances

Causes

  • Dirty or stuck EGR valve
  • EGR solenoid valve malfunction
  • Problems with the EGR vacuum actuator (if any)
  • Contamination of EGR system channels
  • Problems with EGR wiring or connectors

How to Fix

  1. Check the condition of the EGR valve and its channels
  2. Clean or replace EGR valve if necessary
  3. Check the integrity of the system wiring and connectors
  4. Check vacuum system operation (if applicable)
  5. Test the operation of the system after repair

Related codes

P0401P0403P0404

FAQ

What does the P140C code mean?

P140C is an OBD-II diagnostic trouble code that indicates: Exhaust Gas Recirculation Slow Response Decreasing Flow

What causes a P140C error code?

The most common causes of P140C include: Dirty or stuck EGR valve; EGR solenoid valve malfunction; Problems with the EGR vacuum actuator (if any); Contamination of EGR system channels.

How do I fix a P140C diagnostic trouble code?

To fix P140C: Check the condition of the EGR valve and its channels. Clean or replace EGR valve if necessary. Check the integrity of the system wiring and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P140C?

Yes, but get it checked soon

How much does it cost to fix P140C?

The estimated repair cost for P140C is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat