Cause
Intermittent wiring fault
A connection that makes and breaks rather than failing outright, so the fault is stored and gone again by the time anybody looks. The pattern is the diagnosis — whether it appears with heat, cold, damp, vibration or one particular manoeuvre tells you where in the vehicle to look far better than any meter will.
Typically a moderate job.
Some of these codes mean you should stop driving
19 of the 143 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (143)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0074 Ambient Air Temperature Sensor Circuit A Intermittent/Erratic Likely for this code Low
- P0099 Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank 1 Likely for this code Moderate
- P0104 Mass or Volume Air Flow Sensor A Circuit Intermittent Likely for this code Moderate
- P0109 Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Intermittent Likely for this code Moderate
- P0114 Intake Air Temperature Sensor 1 Circuit Intermittent Bank 1 Likely for this code Moderate
- P0119 Engine Coolant Temperature Sensor 1 Circuit Intermittent/Erratic Likely for this code Moderate
- P0124 Throttle/Pedal Position Sensor/Switch A Circuit Intermittent Likely for this code Stop driving High
- P0184 Fuel Temperature Sensor A Circuit Intermittent Likely for this code Moderate
- P0189 Fuel Temperature Sensor B Circuit Intermittent Likely for this code Moderate
- P0194 Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 1 Likely for this code Stop driving High
- P0199 Engine Oil Temperature Sensor A Circuit Intermittent/Erratic Likely for this code Moderate
- P0224 Throttle/Pedal Position Sensor/Switch B Circuit Intermittent Likely for this code Stop driving High
- P0229 Throttle/Pedal Position Sensor/Switch C Circuit Intermittent Likely for this code Stop driving High
- P0233 Fuel Pump Secondary Circuit Intermittent Likely for this code Stop driving High
- P0255 Injection Pump Fuel Metering Control A Intermittent (Cam/Rotor/Injector) Likely for this code Stop driving High
- P0260 Injection Pump Fuel Metering Control B Intermittent (Cam/Rotor/Injector) Likely for this code Stop driving High
- P0323 Ignition/Distributor Engine Speed Input Circuit Intermittent Likely for this code Stop driving High
- P0329 Knock/Combustion Vibration Sensor A Circuit Intermittent Likely for this code Moderate
- P032D Knock/Combustion Vibration Sensor C Circuit High Likely for this code Moderate
- P0334 Knock/Combustion Vibration Sensor B Circuit Intermittent Likely for this code Moderate
- P0339 Crankshaft Position Sensor A Circuit Intermittent Likely for this code Stop driving Critical
- P0344 Camshaft Position Sensor A Circuit Intermittent Bank 1 or Single Sensor Likely for this code Stop driving High
- P0349 Camshaft Position Sensor A Circuit Intermittent — Bank 2 Likely for this code Stop driving High
- P0369 Camshaft Position Sensor B Circuit Intermittent — Bank 1 Likely for this code Stop driving High
- P0373 Timing Reference High Resolution Signal A Intermittent or Erratic Pulses Likely for this code Stop driving High
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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