P245A - EGR Cooler Bypass Control Circuit/Open
The P245A code indicates a problem in the electrical circuit that controls the EGR cooler bypass valve. This valve allows exhaust gases to bypass the EGR cooler under certain conditions to prevent overcooling and condensation. The PCM detects an open or short in the control circuit, which can affect engine performance and emissions.
01. Most Common Causes
- Faulty EGR cooler bypass valve
- Open or shorted wiring in the control circuit
- Corroded or loose electrical connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance
- Increased exhaust emissions
- Possible rough idle or hesitation
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the EGR cooler bypass valve and its wiring for damage or corrosion.
Step 3: Test the valve's resistance and compare to manufacturer specs.
Step 4: Check for voltage and ground at the valve connector with the ignition on.
Step 5: If wiring and valve are okay, test the PCM output signal.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short distances, but continued driving may cause reduced performance and increased emissions. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the cause and vehicle make.