P0341 - Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor)
System
Powertrain (Engine & Gearbox)
Technical Description
The control module has detected a fault in the Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor) (P0341). The reported signal is electrically valid but disagrees with other operating parameters (RPM, load, or other sensors). Affects cylinder bank 1 (bank 1 containing cylinder 1, firewall/right side).
Multimeter Test Points & Nominal Values
| Test Point / Component | Measurement | Nominal Target Range | Test Condition |
|---|---|---|---|
| Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor) – Coil Resistance | Resistance (Ω) | 200 - 1800 Ω (typically 500 - 1200 Ω) | Sensor disconnected at 20°C |
| Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor) – Output (AC Voltage) | Voltage (V) | 0.5 - 2.0 V AC at cranking, rising with RPM | During cranking / engine running |
| Insulation Resistance to Ground | Resistance (MΩ) | > 20 MΩ | Sensor pin to chassis ground |
Sensor disconnected at 20°C
During cranking / engine running
Sensor pin to chassis ground
Oscilloscope Waveform Analysis
2 ms/div, 2 V/divPossible Causes
Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor) is electrically operational but performing outside calibrated tolerance
Bank 1 specific:Inspect wiring harness to cylinder bank 1 (firewall/right bank, exposed to exhaust manifold heat).
Channel A:Verify dedicated wiring pins and signal pair for circuit A against the schematic.
Chafed or pinched wiring harness along the signal path to Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor)
Poor ground connection or excessive voltage drop (> 0.1 V) at the ground point for Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor)
Defective internal output driver or reference circuit in the control module for Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor)
Symptoms
4
Recommended Solution
Compare signal voltage and resistance between circuit A and companion circuit B at module connector.
Cross-swap the component on Bank 1 with Bank 2 to rule out mechanical oil passages and internal timing wear.
Log component live data across varying load points and verify plausibility against engine target model.
Verify loaded supply voltage and harness terminal pins at Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor).
Check circuit continuity and ground-side voltage drop (< 0.05 V) for Camshaft Position Sensor (CMP) 'A' Range/Performance (Bank 1 or Single Sensor).
Scope the signal trace during cranking to verify symmetric sine peaks without missing or deformed teeth.
Mechanic's Tip
Inductive VR sensors often test fine cold but develop an open circuit when engine heat expands the internal fine windings. Gently warm the sensor with a heat gun while monitoring resistance to expose thermal open circuits.