P1345 indicates the powertrain control module (PCM) has detected a discrepancy between the crankshaft position sensor signal and the camshaft position sensor signal. This means the timing of the camshaft relative to the crankshaft is outside the expected range, suggesting either a mechanical timing issue or a failure in one of the position sensors or their circuits. The code is most commonly found on Toyota, Lexus, and some General Motors vehicles.
The camshaft position sensor itself may be faulty, sending incorrect or intermittent signals to the PCM. This is one of the most common causes, particularly in high-mileage vehicles.
A stretched timing chain, worn timing belt, or skipped timing tooth can cause the camshaft and crankshaft to fall out of their proper correlation, triggering this code.
While less common than camshaft sensor failure, a faulty crankshaft position sensor can also trigger a correlation code if its signal becomes inaccurate.
Open circuits, short circuits, or corroded connectors in either the camshaft or crankshaft sensor wiring harness can cause signal loss or interference.
On some engines, a failed timing chain tensioner can allow the chain to skip teeth, creating a timing correlation error.
The PCM itself can occasionally be at fault, but this should be considered only after all other causes are ruled out. PCM failure for this specific code is uncommon.
No. While some sources may recommend PCM replacement, the PCM is rarely at fault for this code. The vast majority of P1345 cases are caused by failed sensors, wiring issues, or timing chain problems. PCM replacement should only be considered after all other causes are definitively ruled out.
Driving is not recommended with this code active. The vehicle may experience hard starting, stalling, or a no-start condition. If the engine runs, it may operate poorly and cause damage to emission components over time. The vehicle should be diagnosed and repaired before regular use.
On many Toyota and Lexus engines, particularly those with timing chains, the camshaft position sensor is the most frequently failed component. However, timing chain stretch and wear should also be thoroughly checked, especially at higher mileages.
Yes, in most regions a vehicle with an active Check Engine Light (which this code triggers) will fail an emissions inspection. Even if the vehicle seems to run, the underlying issue typically increases exhaust emissions beyond acceptable limits.