P1564 Engine Trouble Code
What is P1564?
P1564 code can indicate a faulty oxygen sensor, which may eventually damage the catalytic converter (repair cost: $2,000–$2,200). Professional diagnosis costs around $200–$210. Oxygen sensors are often straightforward to replace — check your owner's manual for location and instructions. This issue should be addressed promptly to prevent further damage.
Code Information
| Code Type: | OBD-II Powertrain (P) Trouble Code |
| System: | Powertrain |
| Code: | P1564 |
P1564 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
P1564 Code Structure
Understanding what each digit means in the P1564 powertrain trouble code:
| P | 1 | 5 | 6 | 4 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Composition Sensor Circuit Malfunction | Cylinder 4 Contribution/Balance Fault | Timing Reference High Resolution Signal A Too Many Pulses |
How to Fix P1564
Diagnostic Steps:
Regarding P1564, carefully inspect the wire harness near the intake manifold bracket, best accessed from below near the oil filter. Look for chafing, pinching, or damaged insulation.
Repair Solution:
A/C pressure sensor monitors refrigerant pressure changes. DTC sets when pressure change falls outside calibration. Verify A/C system function, refrigerant charge, and electrical connections.
Technical Notes:
For P1564, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
P1564 Description
P1564 OBD-II Trouble Code: ASCD Switch Malfunction is one of the definitions for the P1564; however your vehicles manufacturer may have a different definition for the P1564 code. Please check below for your specific make.
Main Cause
The primary reason for P1564 OBD-II Engine Trouble Code is: Fuel Composition Sensor Circuit Malfunction.