Fault code P0370 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P0370 – Timing Reference High Resolution Signal A Malfunction

P0370: Causes, signs and repairs

Error code P0370 is displayed and the check engine light is on - what does this mean?

The OBD-II system detects a fault in camshaft sensor circuit A (cylinder 1). This DTC P0370 indicates problems with the camshaft timing reference signal, which is essential for correct fuel injection and ignition. For various manufacturers, this fault code can also be referred to as "Timing Reference High Resolution Signal A".

What causes can this error code have?

Defective camshaft sensor
Damaged sensor cable or defective plug connections
Loose or corroded plug connections on the sensor
Faulty engine control unit (ECU/PCM)
Mechanical problems on the camshaft or gearwheel
Dirt or metal chips on the sensor
Faulty wiring between sensor and control unit
Incorrect sensor installation or alignment

What symptoms occur in parallel with error code P0370?

Starting problems: The vehicle is difficult to start or does not start at all
Uneven idling: The engine runs unevenly at idle speed
Loss of power: Noticeable reduction in engine power
Jerking when accelerating: Uneven engine running under load
Increased fuel consumption: Engine operates inefficiently
Misfiring: Misfiring in individual cylinders
Stalling of the engine: Especially at low engine speeds

How to fix the problem of trouble code P0370?

Repairing trouble code P0370 requires a systematic diagnosis of the camshaft sensor components.
Replace the camshaft sensor completely and align it correctly, checking the air gap to the encoder wheel
Check sensor cable and plug connections for damage and replace defective parts
Clean plug connections on the sensor, treat contacts with contact spray and connect firmly
Diagnose the engine control unit and have it replaced by a specialist workshop if defective
Check camshaft and gear for mechanical damage and repair
Clean the sensor mounting area and remove any metal chips or dirt
Check all wiring between sensor and ECU for continuity and insulation faults

FAQ - Frequently asked questions about DTC P0370

Can I continue driving with error code P0370?

Continuing to drive with code P0370 is only possible to a limited extent. The vehicle may develop starting problems or suddenly stall, which poses a safety risk. A prompt repair is strongly recommended.

How much does it cost to repair error code P0370?

The cost of repairing the P0370 EOBD code varies between 80-400 euros. A camshaft sensor costs around 50-150 euros, with more complex wiring problems or ECU defects the costs can be significantly higher.

Can I replace the camshaft sensor with error code P0370 myself?

If you have basic knowledge, it is possible to replace the sensor. The sensor is usually easily accessible on the cylinder head. It is important to ensure correct alignment and the correct air gap to the sensor wheel.

How do I recognize a defective camshaft sensor with code P0370?

A defective sensor is indicated by starting problems, rough idling and loss of power. The sensor signal can be checked with a multimeter. Visible damage to the sensor or cable are also indications.

Does error code P0370 cause the main inspection to fail?

Yes, an active OBD fault code P0370 leads to a complaint during the main inspection/ MOT. The check engine light must not be permanently illuminated and all emission systems must be functional.

Can other fault codes occur together with P0370?

Often the codes P0365, P0366 or P0367 also occur, which also affect the camshaft sensor system. Ignition or fuel injection codes can also appear in parallel.

Vehicles in which error code P0370 occurs most frequently

Error code P0370 is a standardized OBD-II trouble code that indicates problems with the camshaft sensor circuit and can occur on various vehicle manufacturers, but is most common on the following vehicles:

Chrysler: 300C, Sebring, PT Cruiser, Town & Country (2004-2010)
Dodge: Caliber, Avenger, Journey, Caravan, Ram (2005-2012)
Jeep: Compass, Patriot, Wrangler, Grand Cherokee (2007-2014)
Mitsubishi: Eclipse, Galant, Outlander, Lancer (2004-2011)
Hyundai: Sonata, Elantra, Tucson, Santa Fe (2006-2013)
Kia: Optima, Sorento, Sportage, Rio (2005-2012)
Nissan: Altima, Sentra, Maxima, Murano (2005-2010)
Infiniti: G35, G37, M35, FX35 (2006-2012)

If code P0370 occurs in your vehicle, you should first have the camshaft sensor and the associated cable connections checked. Many of the affected models have known weak points in the sensors or wiring, which can be avoided with regular maintenance. If problems persist, a professional diagnosis at a specialist workshop is advisable, as modern engine management systems require precise timing signals for efficient operation.

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