P1D94 Engine Trouble Code
What is P1D94?
P1D94 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: | P1D94 |
P1D94 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
P1D94 Code Structure
Understanding what each digit means in the P1D94 powertrain trouble code:
| P | 1 | d | 9 | 4 |
|---|---|---|---|---|
| Powertrain Code | Fuel And Air Metering | Fuel Pump Module Control Circuit Range/Performance | Crankshaft Position Sensor A Circuit Malfunction | Timing Reference High Resolution Signal A Too Many Pulses |
How to Fix P1D94
Diagnostic Steps:
Regarding P1D94, 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:
Verify all electrical connections are clean and tight. Check for damaged wiring, especially in high-heat or high-vibration areas. Use manufacturer wiring diagrams for accurate diagnosis.
Technical Notes:
P1D94 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
P1D94 Description
P1D94 engine trouble code is related to Timing Reference High Resolution Signal A Too Many Pulses.
Main Cause
The primary reason for P1D94 OBD-II Engine Trouble Code is: Fuel Pump Module Control Circuit Range/Performance.