C1702 Engine Trouble Code
What is C1702?
C1702 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 Chassis (C) Trouble Code |
| System: | Chassis |
| Code: | C1702 |
C1702 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
C1702 Code Structure
Understanding what each digit means in the C1702 chassis trouble code:
| C | 1 | 7 | 0 | 2 |
|---|---|---|---|---|
| Chassis Code | Fuel And Air Metering | Fuel Rail Pressure Sensor Circuit Malfunction | Cold Start Injector 1 Malfunction | Glow Plug/Heater Circuit 'A' Malfunction |
How to Fix C1702
Diagnostic Steps:
Regarding C1702, 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:
A/C pressure sensor monitors refrigerant pressure changes. DTC sets when pressure change falls outside calibration. Verify A/C system function, refrigerant charge, and electrical connections.
Technical Notes:
For C1702, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
C1702 Description
C1702 engine trouble code is related to Glow Plug/Heater Circuit 'A' Malfunction.
Main Cause
The primary reason for C1702 OBD-II Engine Trouble Code is: Fuel Rail Pressure Sensor Circuit Malfunction.