P0348: Camshaft Position Sensor A Circuit High Bank 2

P0348 is the bank 2 counterpart of P0343: the signal of the intake camshaft sensor on the side without cylinder 1 stays at supply level without edges. Causes are a signal wire shorted to positive, an open signal wire held high by the module's pull-up, a broken sensor ground or a faulty sensor. A code-specific manufacturer description exists only from GM: on the Saab 9-4X V6 (GM LAU) the signal must stay high without pulses for more than 1 s, or 10 s cumulatively, and the code follows after two trips. Ford's 2023 diesel shows the same check on bank 1 (P0343: system voltage over 10 or more crank revolutions). Other GM engines and Ford petrol engines report such faults under P0345. Result: cam timing on bank 2 switched off, loss of power.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

• Check engine light on
• Longer cranking before the engine starts
• Loss of power (cam timing held in its base position)
• Rough idle, occasionally stalling

Most likely causes

• Bank 2 signal wire open or shorted to positive
• Sensor ground open
• Camshaft position sensor bank 2 faulty
• Connector corroded

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and look for metal filings on the sensor
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. See whether there is an RPM signal while cranking
4. Measure the signal with an oscilloscope if you can
5. Check the engine timing before replacing expensive parts

Good to know

• Repair difficulty: medium
• It can trigger limp mode.
• It affects emissions.

What each character of P0348 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 3: Ignition and misfires
• 48: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0348?

Avoid driving: the engine can stall while moving. If the timing is off, continuing can cause serious damage.

What causes code P0348?

The most common causes are: bank 2 signal wire open or shorted to positive; sensor ground open; camshaft position sensor bank 2 faulty.

Related codes

• P0343Camshaft Position Sensor A Circuit High Bank 1 or Single Sensor
• P0345Camshaft Position Sensor A Circuit Bank 2
• P0347Camshaft Position Sensor A Circuit Low Bank 2
• P0393Camshaft Position Sensor B Circuit High Bank 2

Sources

• saabwisonline.com: dtc p0341 p0342 p0343 p0346 p0347 p0348 p0366 p036
• fordservicecontent.com: obd summary diesel 2023
• law.cornell.edu: 13 CCR 1968.2
• hella.com: camshaft position sensor

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.