Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer restarted itself when it wasn't supposed to. It's like when a tablet or phone suddenly restarts for no reason.
The vehicle's control module unexpectedly performed a warm reset, indicating a potential software or hardware issue.
P16D5 is set when the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects an unwanted warm reset during its self-test routine. This can be caused by software glitches, electrical noise, or hardware faults.
• Check Engine Light (CEL) is on
• Intermittent engine performance issues
• Unexpected vehicle behavior
• Software glitches in the ECM/PCM
• Faulty wiring or connections
• Defective control module
ECM: Engine Control Module
PCM: Powertrain Control Module
• Check for other related codes
• Inspect wiring and connections to the control module
• Perform a software update or reflash the ECM/PCM
• Update or reflash the ECM/PCM software
• Repair or replace faulty wiring
• Replace the control module if necessary
• OBD-II scanner
• Multimeter
• ECM/PCM programming tool
$150 - $1200
Moderate
• Chevrolet Malibu
• GMC Sierra
• Buick Enclave
• Regular software updates
• Routine inspection of wiring
• Avoid aftermarket modifications
Software/Control Module Issue
• Ensure your vehicle's software is up to date
• Consult a professional mechanic if the issue persists
Check if the control module is covered under the vehicle's powertrain warranty.
This code has become more common with the increase in vehicle electronic complexity.
Moderate – Should be addressed to prevent potential drivability issues.
Ignoring this code may lead to unexpected vehicle behavior, which could pose a safety risk.
• Engine at operating temperature
• Performing a self-test routine
The control module is typically located in the engine bay or under the dashboard.
Q: Can I drive with a P16D5 code?
A: It's possible, but not recommended as it may lead to further issues.
Q: Will a software update fix the P16D5 code?
A: In many cases, a software update can resolve this issue.
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