P1292 - High Side #2 (Left) Short to Ground or B+
The P1292 code indicates a short circuit in the high side driver circuit for the left fuel injector or ignition coil (bank 2, left side). This can be a short to ground or battery positive voltage (B+), causing the driver to malfunction. The powertrain control module (PCM) monitors the voltage on the high side driver and sets this code when it detects an abnormal condition, often leading to misfires or no-start conditions.
1. Symptoms You Will Notice
- Engine misfire on left cylinder(s)
- Check Engine Light illuminated
- Rough idle or hesitation
- Possible no-start condition
2. Most Common Causes
- Short to ground in wiring harness for left injector/coil
- Short to B+ in wiring harness for left injector/coil
- Faulty fuel injector or ignition coil on left side
- Damaged PCM (rare)
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect wiring and connectors for left injector/coil for damage or shorts.
Step 3: Measure resistance of left injector/coil; compare to specs.
Step 4: Check for voltage at the high side driver output with key on; should be near battery voltage when off.
Step 5: Perform a continuity test from the driver circuit to ground and B+ to isolate short.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with P1292 can cause engine misfires, reduced performance, and potential damage to the catalytic converter or PCM. It is best to diagnose and repair promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether it's a wiring repair or component replacement (injector/coil). PCM replacement is more expensive.
5. Commonly Affected Makes
This is a manufacturer-specific code. The exact manufacturer is not confirmed in our current database.