P1198 Engine Trouble Code
What is P1198?
P1198 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: | P1198 |
P1198 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
P1198 Code Structure
Understanding what each digit means in the P1198 powertrain trouble code:
| P | 1 | 1 | 9 | 8 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Rail/System Pressure — Too High | Crankshaft Position Sensor A Circuit Malfunction | Clutch Position Sensor Circuit Malfunction |
How to Fix P1198
Diagnostic Steps:
Regarding P1198, 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:
Most manufacturers number cylinders sequentially from front to back. Ford V-engines start with cylinder 1 at front left. In V-6 engines, cylinder 4 is front right; in V-8 engines, cylinder 5 occupies that position.
Technical Notes:
For P1198, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
P1198 Description
P1198 OBD-II Trouble Code: Pump Rotor Control Underfueling is one of the definitions for the P1198; however your vehicles manufacturer may have a different definition for the P1198 code. Please check below for your specific mak
Main Cause
The primary reason for P1198 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.