B1338 Engine Trouble Code
What is B1338?
When B1338 code appears, first check your gas cap. Pull over safely, ensure it is tight, and inspect for cracks. A loose or damaged gas cap affects fuel-system pressure and emissions. A replacement cap costs about $3–$10. This simple fix can resolve the code and improve fuel economy.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B1338 |
B1338 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
B1338 Code Structure
Understanding what each digit means in the B1338 body trouble code:
| B | 1 | 3 | 3 | 8 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering | Throttle/Pedal Position Sensor/Switch A Circuit Intermittent | Injection Pump Fuel Metering Control 'A' High | Clutch Position Sensor Circuit Malfunction |
How to Fix B1338
Diagnostic Steps:
Oxygen sensors measure exhaust gas oxygen content to optimise air-fuel ratio. This optimisation improves fuel economy and reduces emissions. Sensors degrade over time and require periodic replacement.
Repair Solution:
Crankshaft position sensor signals the computer for precise ignition and fuel injection timing. Faulty sensors cause rough running and reduced efficiency. Modern vehicles enter limp mode and illuminate the check-engine light.
Technical Notes:
Parts or components should not be replaced based solely on B1338 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
B1338 Description
B1338 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for B1338 OBD-II Engine Trouble Code is: Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.