2001 GMC Astro Van P1345 Code: Diagnosis and Fix Guide (01/02 Suffix Explained)

P1345 is a common code on 2001-2002 GM Astro Van 4.3L V6 engines. The '01/02' suffix suggests it may relate to a specific software or sensor version — verify this with your OBD-II scanner manufacturer. This code typically indicates that the Camshaft Position (CMP) and Crankshaft Position (CKP) sensors are not detecting TDC at the same time. While timing chain stretch is possible, many cases can be resolved by checking distributor alignment or ignition components. Possible causes: - Distributor has been moved or replaced incorrectly - Timing chain is loose or stretched - Worn cap or rotor (even minor misalignment can trigger this) First step: Use a scanner to check the CKP-CMP offset. Then inspect the distributor and timing components. Search Google for 'GM P1345 2001 Astro Van' — there are numerous forums, videos, and repair guides available. Let me know if you need further help.

I recently purchased a used 2001 Astro Van. It had no check engine light when I left the dealership. After driving about 30 miles home, the engine warning light came on. I scanned it and found P1345. I initially thought the dealer might have cleared the code, but it returned after a few miles of driving. A forum post suggested that a worn camshaft position sensor could be the cause — this is worth investigating.

The Camshaft Position (CMP) sensor is located inside the distributor and does not control ignition timing directly. Its role is to set the initial timing reference. The P1345 code occurs when CKP and CMP signals disagree on TDC. Using an OBD-II scanner, you can check the offset — how many degrees apart the sensors are reading. Common issues: - Distributor has been moved or replaced incorrectly - Timing chain is loose or stretched - Ignition components (cap/rotor) misaligned Always inspect the distributor area before replacing parts. Start by checking for physical movement or wear. Look up tutorials on 'how to remove engine cover 2001 Astro Van' — there are many video guides available.

KEV2: Thank you! Where is the best place to access the distributor on a 2001 Astro Van? Can I reach it from inside the car through the engine cover, or do I need to go under the hood? — Wally S.

There's no immediate need to replace parts. Have you discussed this issue with the seller? If the vehicle is less than a day old, they should have addressed any known issues. The distributor is located on the back of the engine and can be accessed through the engine cover (the 'doghouse'). Before taking action: - Use an OBD-II scanner to check CKP-CMP offset - Inspect for loose or worn components For step-by-step guidance, search: "02 Astro Van 4.3 engine cover removal tutorial" — there are clear how-to videos and diagrams available online.

kev2: Thanks for the info on engine cover removal! I’ll remove the cover and inspect the distributor area for any loose components. I'll also let the used car dealer know about the P1345 code I’ve found. — Wally