Parts for your 2009 Holden Colorado-Crank angle sensor

2009 Holden Colorado crank-angle sensor: purpose, service and replacement

The 2009 Holden Colorado is fitted with a crank-angle sensor (also called a crankshaft position sensor). Technical sources confirming this include the Holden Colorado RC Service Manual (Engine Controls – CKP section), the Isuzu 4JJ1‑TC Engine Workshop Manual (Crankshaft Position Sensor), and GM/Isuzu diagnostic documentation referencing DTCs P0335–P0339 for crankshaft position sensor faults. On the 3.0L 4JJ1 diesel that most Aussies and Kiwis know in the Colorado, the CKP is integral to injection timing. Petrol variants also rely on it for spark timing.

What does it do? The crank-angle sensor tracks the exact position and speed of the crankshaft. The ECU uses that to fire injectors and, on petrol engines, to time spark. If the signal drops out, the engine can be hard to start, run rough, or not run at all. It’s the heartbeat signal the ECU can’t do without.

Where is it? On the 4JJ1 diesel, it’s typically mounted at the front of the engine near the crank pulley/timing case, reading a reluctor wheel. On petrol variants, it may be at the rear of the block near the bellhousing. It’s a sealed magnetic/Hall-effect sensor with an O‑ring and a single retaining bolt.

• Common symptoms: no start or long crank, random stalling (often worse hot), rough idle, flat spots, poor power, MIL on with codes like P0335–P0339.
• It isn’t a scheduled service item, but during servicing it pays to inspect the harness and connector, look for oil leaks onto the sensor, and check for damaged wiring near the front of the engine.

Replacement tips: choose an OE-quality sensor. Disconnect the battery, remove the retaining bolt, twist the old sensor out, and fit a new O‑ring. Lightly oil the O‑ring, seat the sensor squarely, and tighten the bolt to the workshop manual spec. Route the loom exactly as factory to avoid chafing. Many models benefit from a crank/cam correlation relearn using a scan tool, after fitting, clear codes and perform the relearn, then road test.

Practical advice: if a Colorado keeps throwing CKP codes, don’t just throw parts at it—inspect the reluctor wheel for damage, check engine earths, and scope the signal if possible. Heat-soak failures are common, so testing when hot can reveal an intermittent sensor. Keeping the area clean and free of oil weeps helps the sensor live a long, drama-free life.

FAQ

Where is the crank-angle sensor on a 2009 Holden Colorado?
On the 3.0L 4JJ1 diesel it’s usually at the front of the engine near the crank pulley/timing cover, reading a toothed wheel. On petrol models it may be mounted at the rear of the block by the bellhousing. Access is from under the front, with the splash shield off, or from up top depending on model and accessories.

Do you need to program or relearn anything after replacing the sensor?
Often, yes. Many RC Colorados benefit from a CKP/CMP correlation relearn using a capable scan tool. It helps the ECU line up the new sensor’s timing signal and can prevent repeat fault codes. Clear codes, perform the relearn, and take it for a decent drive cycle.

Can a failing crank-angle sensor cause hot no-starts or random stalling?
Absolutely. Heat-soak can make a marginal sensor drop its signal, causing a stall or a no-start until it cools. If that sounds familiar, inspect the wiring, check for oil contamination, and test the sensor output when the engine is hot. A clean signal and solid wiring fix most headaches.