C1599 Engine Trouble Code
What is C1599?
C1599 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 Chassis (C) Trouble Code |
| System: | Chassis |
| Code: | C1599 |
C1599 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
C1599 Code Structure
Understanding what each digit means in the C1599 chassis trouble code:
| C | 1 | 5 | 9 | 9 |
|---|---|---|---|---|
| Chassis Code | Fuel And Air Metering | Fuel Composition Sensor Circuit Malfunction | Crankshaft Position Sensor A Circuit Malfunction | Reverse Input Circuit |
How to Fix C1599
Diagnostic Steps:
Regarding C1599, 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:
VSS concerns may stem from noisy input signals caused by RFI/EMI from ignition wires, charging circuits, or aftermarket equipment. Verify VSS reads 0 mph when transmission is in Park.
Technical Notes:
C1599 DTC specifically relates to camshaft timing. When cam timing is over-retarded, the check-engine light illuminates and this code sets. Verify VCT solenoid operation and check for contamination.
C1599 Description
C1599 engine trouble code is related to Reverse Input Circuit.
Main Cause
The primary reason for C1599 OBD-II Engine Trouble Code is: Fuel Composition Sensor Circuit Malfunction.