C1158 Engine Trouble Code
What is C1158?
C1158 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: | C1158 |
C1158 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
C1158 Code Structure
Understanding what each digit means in the C1158 chassis trouble code:
| C | 1 | 1 | 5 | 8 |
|---|---|---|---|---|
| Chassis Code | Fuel And Air Metering | Fuel Rail/System Pressure — Too High | Cylinder 1 Injector Circuit Low | Clutch Position Sensor Circuit Malfunction |
How to Fix C1158
Diagnostic Steps:
Regarding C1158, 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:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on C1158 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
C1158 Description
C1158 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for C1158 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.