Fault Family System: Powertrain (P-Codes) 20 SAE Codes

Cam Position Sensor Circuit

Diagnostic & Technical Explanation

Code P0340 (Camshaft Position Sensor A Circuit Bank 1 or Single Sensor) sets when the ECM sees an open circuit, out-of-range voltage, or an erratic signal from the primary camshaft position sensor used for cylinder identification and cam-to-crank correlation — distinct from a VVT phaser's own actuator-position feedback sensor. Common causes are a corroded connector, a worn or contaminated reluctor/trigger wheel on the camshaft, an incorrect air gap, or chafed wiring between the sensor and the ECM.

These 20 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 20 times.

Codes in this family (20)

Code	Definition	Repair coverage
P0340	Camshaft Position Sensor A Circuit Bank 1 or Single Sensor	4 ranked fixes
P0341	Camshaft Position Sensor A Circuit Range/Performance Bank 1 or Single Sensor	4 ranked fixes
P0342	Camshaft Position Sensor A Circuit Low Bank 1 or Single Sensor	4 ranked fixes
P0343	Camshaft Position Sensor A Circuit High Bank 1 or Single Sensor	4 ranked fixes
P0344	Camshaft Position Sensor A Circuit Intermittent Bank 1 or Single Sensor	4 ranked fixes
P0345	Camshaft Position Sensor A Circuit Bank 2	4 ranked fixes
P0346	Camshaft Position Sensor A Circuit Range/Performance Bank 2	4 ranked fixes
P0347	Camshaft Position Sensor A Circuit Low Bank 2	4 ranked fixes
P0348	Camshaft Position Sensor A Circuit High Bank 2	4 ranked fixes
P0349	Camshaft Position Sensor A Circuit Intermittent Bank 2	4 ranked fixes
P0365	Camshaft Position Sensor B Circuit Bank 1	4 ranked fixes
P0366	Camshaft Position Sensor B Circuit Range/Performance Bank 1	4 ranked fixes
P0367	Camshaft Position Sensor B Circuit Low Bank 1	4 ranked fixes
P0368	Camshaft Position Sensor B Circuit High Bank 1	4 ranked fixes
P0369	Camshaft Position Sensor B Circuit Intermittent Bank 1	4 ranked fixes
P0390	Camshaft Position Sensor B Circuit Bank 2	4 ranked fixes
P0391	Camshaft Position Sensor B Circuit Range/Performance Bank 2	4 ranked fixes
P0392	Camshaft Position Sensor B Circuit Low Bank 2	4 ranked fixes
P0393	Camshaft Position Sensor B Circuit High Bank 2	4 ranked fixes
P0394	Camshaft Position Sensor B Circuit Intermittent Bank 2	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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