P1293
High Side Open Bank No. 1
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light Illuminates
- Deterioration of vehicle dynamics
- Increased level of harmful emissions
Causes
- Broken wire in the oxygen sensor heater circuit
- Faulty heater circuit relay or fuse
- Wiring harness damage
- Malfunction of the oxygen sensor itself
- Problems with contacts in the sensor connector
How to Fix
- Check the integrity of the fuses and relays of the heater circuit
- Check the condition of the wiring harness and connectors
- Measure the resistance of the oxygen sensor heater
- Check the voltage in the heater circuit
- If necessary, replace the oxygen sensor