Ignition

P0345 — Camshaft Position Sensor A Circuit, Bank 2

Severity: medium Drive with care, to a shop

What P0345 means

The engine computer compares the Bank 2 camshaft sensor signal with the crankshaft sensor signal to know which stroke each cylinder is on, so it can time fuel injection and spark. P0345 sets when that camshaft signal is missing, erratic or out of range. Bank 2 is the side of the engine that does not contain cylinder 1.

Symptoms

  • Check Engine light on
  • Hard starting or no start
  • Rough idle or stalling
  • Reduced power and sluggish acceleration
  • Misfires or hesitation under load
  • Timing chain rattle if the chain is the cause

Possible causes

  1. Failed Bank 2 camshaft position sensor
  2. Damaged or corroded sensor wiring or connector
  3. Chafed wiring in the harness under the valve cover
  4. Faulty crankshaft position sensor upsetting signal correlation
  5. Stretched timing chain, jumped timing or cam phaser problems
  6. Rarely, a faulty PCM

How to diagnose

  1. Scan all codes and freeze frame data, and note any crankshaft sensor or misfire codes
  2. Inspect the Bank 2 sensor, connector and harness for oil, corrosion, chafing and loose pins
  3. Test sensor power, ground and signal wires with a multimeter per the factory wiring diagram
  4. Scope the sensor signal during cranking and while running
  5. Compare the camshaft and crankshaft signals for correlation
  6. Check timing marks, chain slack and wear, and cam phaser operation
  7. Clear the code and confirm it does not return only after the cause is fixed

Common fixes

  • Replace the Bank 2 camshaft position sensor
  • Repair the wiring or replace the connector or harness section
  • Replace the crankshaft position sensor if it is faulty
  • Replace the timing chain and tensioners or repair the cam phaser
  • Repair or reflash the PCM as a last resort

P0345 on different brands

Ford · manuals
On Ford's 2024-2025 gasoline engine monitor strategy, P0345:01 refers to the intake camshaft position circuit on Bank 2; it names the detected condition, not a confirmed failed part.

Questions and answers

Can I drive with a P0345 code?

Only briefly and carefully, to reach a shop. The engine may misfire, lose power or stall, so if it starts hard or hesitates badly, have it towed.

What most often causes P0345?

Most often it is the Bank 2 camshaft sensor itself or its wiring and connector. If those check out, look at the crankshaft sensor and the timing chain condition.

Is replacing the sensor enough?

Not always. Inspect the wiring and connector and test the signal first, otherwise a new sensor may not fix it, especially if the timing chain is worn.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.