P140A
Exhaust Gas Recirculation Cooling Bypass Rationality
P140A is an OBD-II diagnostic trouble code meaning: Exhaust Gas Recirculation Cooling Bypass Rationality. Common causes: egr cooling bypass valve malfunction, clogged egr cooling system channels. Estimated repair cost: $28–89.
Symptoms
- Loss of engine power
- Increased fuel consumption
- Unstable operation at idle
- Detonation (knock of fingers)
- Check Engine Light Illuminates
Causes
- EGR cooling bypass valve malfunction
- Clogged EGR cooling system channels
- Problems with electrical wiring (open or short circuit)
- EGR temperature sensor malfunction
- Engine control unit software error
How to Fix
- Check the condition of the bypass valve and its electrical connections
- Clean the EGR cooling system from deposits
- Check the EGR temperature sensor and its wiring
- Diagnose and, if necessary, reflash the engine control unit
- Replace faulty system components
Related codes
FAQ
What does the P140A code mean?
P140A is an OBD-II diagnostic trouble code that indicates: Exhaust Gas Recirculation Cooling Bypass Rationality
What causes a P140A error code?
The most common causes of P140A include: EGR cooling bypass valve malfunction; Clogged EGR cooling system channels; Problems with electrical wiring (open or short circuit); EGR temperature sensor malfunction.
How do I fix a P140A diagnostic trouble code?
To fix P140A: Check the condition of the bypass valve and its electrical connections. Clean the EGR cooling system from deposits. Check the EGR temperature sensor and its wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P140A?
Limited driving only, diagnose soon
How much does it cost to fix P140A?
The estimated repair cost for P140A is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat