What Does P1613 Mean?
The malfunction indicator lamp (MIL/check engine light) control circuit has an electrical fault, either open circuit or short to positive voltage. The ECM cannot properly control the MIL illumination.
Common Causes
35%
Damaged or corroded wiring between ECM and instrument cluster causing open circuit or short to power
25%
Faulty instrument cluster with internal MIL circuit failure
20%
Corroded or loose connector pins at ECM or instrument cluster
15%
ECM internal driver circuit failure for MIL control
5%
Aftermarket installation damage to MIL circuit wiring
Diagnostic Steps
1
Step 1: Inspect MIL bulb operation manually and verify instrument cluster functionality
2
Step 2: Check voltage at MIL control wire at instrument cluster connector with key on, engine off (should read battery voltage)
3
Step 3: Using scan tool, command MIL on/off and monitor for proper response while measuring voltage
4
Step 4: Perform continuity test on MIL control wire between ECM and instrument cluster with power off
5
Step 5: Check for short to power by measuring voltage on MIL control wire with ECM connector disconnected
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
The malfunction indicator lamp (MIL/check engine light) control circuit has an electrical fault, either open circuit or short to positive voltage. The ECM cannot properly control the MIL illumination.
The most common cause of P1613 (MIL Call-Up Circuit Open/Short To Positive) is: Damaged or corroded wiring between ECM and instrument cluster causing open circuit or short to power
Typical repair costs for P1613 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No direct safety concern, but loss of MIL function means driver will not be alerted to future engine problems. Vehicle remains driveable.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1613 to identify the root cause.
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Quick Info
Category
Powertrain
System
Instrument Cluster / Warning Lamps
Difficulty
Type
Manufacturer
Recommended Tools
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