The P068B code is an OBD-II trouble code that indicates a problem with the Powertrain Control Module (PCM) power relay. This code is triggered when the PCM detects that the power relay has failed to energize properly, which can lead to significant issues with engine performance.
What Does the P068B Code Mean?
The P068B code signifies that the ECM/PCM power relay is not functioning as expected, leading to a delay in power delivery to the engine control module. This indicates a fault in the relay or associated wiring, which can prevent the engine from starting or running properly.
What Causes the P068B Code?
Several factors can trigger the P068B code, including:
- Powertrain Control Module (PCM) failure
- Powertrain Control Module (PCM) power relay failure
- Wiring issues affecting the relay or PCM
What Are the Symptoms of the P068B Code?
Common symptoms associated with the P068B code include:
- Hard or no start, particularly in cold weather
- Engine cranking without starting
- Intermittent engine performance issues
How Serious Is the P068B Code?
The P068B code is classified as urgent and requires immediate attention. Delaying repairs can lead to severe engine damage or compromise vehicle safety, as it prevents the engine from starting or running efficiently.
How to Diagnose the P068B Code
To diagnose the P068B code, follow these steps:
- Use an OBD-II scanner to retrieve the P068B code and any related codes.
- Inspect the PCM power relay and associated wiring for damage or corrosion.
- Test the power relay for proper operation.
- Check the voltage and ground signals to the PCM.
- Replace any faulty components as necessary.
Common Repairs for the P068B Code
Repairs for the P068B code may include:
- Replacing the PCM power relay
- Repairing or replacing damaged wiring
- Replacing the Powertrain Control Module (PCM) if it is found to be faulty
How Much Does It Cost to Fix the P068B Code?
The cost to fix the P068B code can vary widely depending on the specific repairs needed. On average, you can expect to pay between $100 to $500, depending on labor rates and parts required.
Can I Fix the P068B Code Myself?
While some skilled DIY mechanics may be able to diagnose and repair the P068B code, it is advisable to consult a professional mechanic to ensure proper diagnosis and repair. Due to the potential complexity of the issue, professional help can save time and prevent further damage.
