P1158 Engine Trouble Code
What is P1158?
P1158 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: | P1158 |
P1158 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
P1158 Code Structure
Understanding what each digit means in the P1158 powertrain trouble code:
| P | 1 | 1 | 5 | 8 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Rail/System Pressure — Too High | Cylinder 1 Injector Circuit Low | Clutch Position Sensor Circuit Malfunction |
How to Fix P1158
Diagnostic Steps:
Regarding P1158, 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 P1158 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
P1158 Description
P1158 OBD-II Trouble Code: Lack Of HO2S22 Switch - Sensor Indicates Rich is one of the definitions for the P1158; however your vehicles manufacturer may have a different definition for the P1158 code. Please check below for you
Main Cause
The primary reason for P1158 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.