Starter Relay Circuit High Voltage
The P0617 code indicates that the Powertrain Control Module (PCM) has detected a voltage higher than the specified range in the starter relay control circuit. This typically points to a short to voltage, a faulty relay, or a PCM issue. The starter relay is responsible for supplying power to the starter solenoid when the ignition key is turned to the start position. A high voltage condition can prevent the starter from engaging or cause erratic operation.
1. Most Common Causes
- Faulty starter relay with welded contacts
- Short to voltage (B+) in the relay circuit wiring
- Corroded or loose connections in the relay circuit
- Internal ECM/PCM failure
- Faulty ignition switch
- Internal starter solenoid failure
2. Symptoms You Will Notice
- Engine cranks slowly or not at all
- Starter stays engaged after engine starts
- No crank condition
- Check Engine Light illuminated
3. Step-by-Step Diagnosis
Step 1: Scan for other codes and note freeze frame data.
Step 2: Visually inspect starter relay and wiring for damage or corrosion.
Step 3: Test starter relay operation using a multimeter (check for battery voltage at the control circuit with key in start position).
Step 4: Check for shorts to voltage in the relay control circuit from PCM to relay.
Step 5: If all else is normal, test PCM output or replace PCM as last resort.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not recommended. The vehicle may fail to start or the starter may remain engaged, causing damage to the starter or flywheel.
How much does it cost to fix?▼
Typically between $50 and $150 for relay replacement and wiring repair. PCM replacement can cost significantly more.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.