B1134 Engine Trouble Code
What is B1134?
With B1134, you may drive for several weeks with a malfunctioning MAF sensor, but expect decreased fuel economy and eventual stalling. Shop replacement costs $240–$400 depending on vehicle. The labour is straightforward, with most cost from the part itself.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B1134 |
B1134 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
B1134 Code Structure
Understanding what each digit means in the B1134 body trouble code:
| B | 1 | 1 | 3 | 4 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering | Fuel Rail/System Pressure — Too High | Injection Pump Fuel Metering Control 'A' High | Timing Reference High Resolution Signal A Too Many Pulses |
How to Fix B1134
Diagnostic Steps:
Poor running symptoms align with MAP sensor malfunction. In some cases, a faulty MAP sensor will not trigger a code. The issue may represent separate wiring concerns requiring individual diagnosis.
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 B1134 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
B1134 Description
B1134 engine trouble code is related to Timing Reference High Resolution Signal A Too Many Pulses.
Main Cause
The primary reason for B1134 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.