P0337

Crankshaft Position Sensor "A" Circuit Low

Car Fault Codes Ignition & misfire

Can you still drive? With care, short trips only

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 2 hours

Typical cost SAR 100 to 600

What it means

The crankshaft position (CKP) sensor signal is below the minimum the engine computer expects, or stuck at a low level. This is usually caused by a short to ground, a lost sensor supply or a failed sensor, and it can prevent the engine from starting or make it stall.

Symptoms4

Hard starting, or the engine cranks but does not start.
Sudden stalling while driving.
Stumbling or reduced performance.
Check engine light on.

Possible causes6

Signal wire shorted to ground through damaged insulation or chafing.
Open or weak sensor supply on three-wire sensors.
Failed sensor.
Corroded or oil-soaked connector.
A short in another sensor sharing the same supply line as the CKP sensor, pulling the supply voltage down.
Engine computer fault (rare).

How to diagnose5

Read all codes; if other sensors show low voltage codes such as P0342, check the shared supply line first.
Inspect the wiring for damaged insulation or chafing against the engine.
Measure supply voltage and ground at the sensor connector and compare them with the manufacturer specification.
Unplug the sensor and check that the signal wire is not shorted to ground.
Check the sensor signal while cranking on an oscilloscope if available.

How to fix5

Repair damaged wiring or wiring shorted to ground.
Clean the connector and fix any oil leak reaching it.
Repair the shared supply line or replace the other sensor that pulls the voltage down.
Replace the CKP sensor if it is proven faulty.
Clear the codes, start the engine, road test and confirm the code does not return.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low when a wire or connector is at fault and rises with a new sensor, especially where it is hard to reach.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

Why did a camshaft sensor code appear with this one?

On many cars both sensors are fed from one supply line in the computer, so a short in one of them or its wiring pulls the voltage down on both and sets both codes.

Should I replace the sensor right away?

Check the wiring and supply first, because a wire shorted to ground is a common cause of this code and a new sensor will not fix it.

This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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