P0370 BMW Code - Timing Reference High Resolution Signal 'A' Malfunction

The P0370 code indicates a "Timing Reference High Resolution Signal 'A' Malfunction," which means the engine control module (ECM) has detected a problem with the high-resolution timing signal from the crankshaft or camshaft sensor.

Symptoms may include engine misfires, poor acceleration, rough idling, difficulty starting the engine, reduced fuel efficiency, or the Check Engine Light being illuminated.

Common causes include a faulty crankshaft or camshaft position sensor, damaged wiring or connectors, a misaligned timing belt or chain, or a malfunctioning ECM.

Yes, a faulty or failing crankshaft position sensor is a common cause of the P0370 code as it disrupts the high-resolution timing signal.

Start by scanning for codes using an OBDII scanner, then inspect the crankshaft and camshaft position sensors, check wiring and connectors for damage, and verify that the timing belt or chain is properly aligned.

Driving with the P0370 code is not recommended, as it can lead to poor engine performance, potential stalling, or further engine damage if the issue is not addressed promptly.

Fixes may include replacing a faulty crankshaft or camshaft position sensor, repairing damaged wiring or connectors, realigning the timing belt or chain, or reprogramming or replacing the ECM if necessary.

Yes, a loose or misaligned timing belt or chain can disrupt the timing signal and trigger the P0370 code.

The cost depends on the root cause. Replacing a crankshaft or camshaft sensor typically ranges from $150 to $400, while timing belt or chain repairs can be more expensive, ranging from $500 to $1,500 or more.

While you can clear the code with a scanner, it will likely return if the underlying issue isn’t resolved. Ignoring the problem can lead to further engine damage.