| DTC Data Sheet | |
| System | Powertrain |
| Standard | SAE J2012 / ISO 15031-6 |
| Fault type | Performance |
| Official meaning | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2) |
Bank 2 CMP signal is present but the cam-crank correlation or pulse pattern is wrong. Typically chain stretch, reluctor damage, or a marginal sensor.
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P0346 Quick Answer
Bank 2 CMP signal is present but the cam-crank correlation or pulse pattern is wrong. Typically chain stretch, reluctor damage, or a marginal sensor.
What Does P0346 Mean?
Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2). Bank 2 CMP signal is present but the cam-crank correlation or pulse pattern is wrong. Typically chain stretch, reluctor damage, or a marginal sensor.
Symptoms
- Hard start
- Misfires biased toward bank 2
- Reduced fuel economy
Common Causes
- Stretched bank 2 timing chain
- Damaged bank 2 reluctor or trigger ring
- Marginal CMP sensor producing weak signal
- Excessive sensor air gap
Diagnosis Steps
You’ll need a scan tool capable of reading live powertrain data, a digital multimeter, and access to the wiring diagram for the specific platform.
- Check cam-crank correlation live data.
- Inspect bank 2 timing chain stretch.
- Scope the bank 2 CMP signal.
- Verify air gap.
Possible Fixes
- Bank 2 CMP replacement
- Bank 2 timing chain kit
- Reluctor replacement
Can I Still Drive With P0346?
The vehicle will usually still drive with P0346 stored, but performance, drivability, or emissions will be degraded. The PCM may inhibit emissions monitors and limit closed-loop fueling adjustments. Drive to a workshop, but don’t ignore the code long-term.
How Serious Is This Code?
P0346 is a moderate-priority fault. It will not prevent the engine from running, but unaddressed it can cascade into related faults or damage downstream components such as the catalytic converter. Address within a few drive cycles.
FAQ
Will P0346 clear itself?
Only if the underlying fault was intermittent and self-corrected. Most root causes are persistent and require physical repair.
Can I clear P0346 without fixing it?
You can clear it with a scan tool, but it will return as soon as the fault condition reappears — typically within one or two drive cycles.
Is P0346 related to other codes?
Often, yes. Adjacent codes in the same circuit or system frequently set together — if P0346 is present, scan for related codes and address them as a group.