Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is getting a weak signal from the third knock sensor on the engine's second side. It's like trying to hear a whisper in a noisy room.
The knock sensor detects engine knocking or pinging, which can cause damage. This code indicates a low signal from the third knock sensor on bank 2, meaning it might not be working properly.
The P13D2 code is triggered when the Engine Control Module (ECM) detects a low voltage signal from Knock Sensor 3 Circuit 'B' on Bank 2. This sensor is responsible for detecting abnormal combustion (knocking) in the engine and sending this information to the ECM to adjust timing and fuel mixture accordingly.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Engine knocking noise
• Faulty knock sensor
• Wiring issues such as a short or open circuit
• Poor electrical connection
• ECM malfunction
Knock Sensor: A device that detects engine knocking or pinging.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the knock sensor for proper operation.
• Check the ECM for any faults.
• Replace the faulty knock sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance checks
• Ensure proper engine tuning
• Use quality fuel
Sensor Issue
• Do not ignore the Check Engine Light.
• Have a professional diagnose the issue if you're unsure.
• Regularly check and maintain engine sensors.
Check with the vehicle manufacturer for warranty coverage on engine sensors.
Knock sensor issues have been common in vehicles with advanced engine management systems, especially in high-performance engines.
Moderate – Addressing this issue promptly can prevent engine damage.
Driving with a faulty knock sensor can lead to engine damage and may not comply with emissions regulations.
• Engine at normal operating temperature
• Vehicle stationary and in neutral or park
The knock sensor is typically located on the engine block, cylinder head, or intake manifold.
Q: Can I drive with a P13D2 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to engine damage.
Q: How do I know if my knock sensor is bad?
A: Symptoms of a bad knock sensor include poor engine performance, increased fuel consumption, and a knocking noise.
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